Exemestane is used in the adjuvant treatment of hormonally-responsive breast cancer in postmenopausal women. It irreversibly binds to the active site of the enzyme resulting in permanent inhibition. It is an oral steroidal aromatase inhibitor.. Reference standards of Exemestane API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below
stdClass Object ( [pname] => Exemestane [catalogue_number] => PA 05 54000 [category_ids] => ,78,70,82,87, [chemical_name] => [weight] => 296.40 [form] => C20H24O2 [cas] => 107868-30-4 [pslug] => 107868-30-4-exemestane-api-pa0554000 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54000
CAS :
Molecular Formula : C20H24O2
Molecular Weight : 296.40
stdClass Object ( [pname] => Exemestane - Impurity D [catalogue_number] => PA 05 54040 [category_ids] => ,70,75,78,82,87, [chemical_name] => [weight] => 284.39 [form] => C19H24O2 [cas] => 897-06-3 [pslug] => 897-06-3-exemestane-impurity-d-pa0554040 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54040
Molecular Formula : C19H24O2
Molecular Weight : 284.39
stdClass Object ( [pname] => Exemestane - Impurity E [catalogue_number] => PA 05 54050 [category_ids] => ,70,78,82,87,98, [chemical_name] => [weight] => 298.42 [form] => C20H26O2 [cas] => 19457-55-7 [pslug] => 19457-55-7-exemestane-impurity-e-pa0554050 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54050
Molecular Formula : C20H26O2
Molecular Weight : 298.42
stdClass Object ( [pname] => Exemestane - Impurity F [catalogue_number] => PA 05 54060 [category_ids] => ,78,70,82,87,75, [chemical_name] => [weight] => 298.38 [form] => C19H22O3 [cas] => 72648-46-5 [pslug] => 72648-46-5-exemestane-impurity-f-pa0554060 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54060
Molecular Formula : C19H22O3
Molecular Weight : 298.38
stdClass Object ( [pname] => Exemestane α-Spirooxirane [catalogue_number] => PA 05 54520 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 312.4 [form] => C20H24O3 [cas] => 152764-24-4 [pslug] => 152764-24-4-exemestane-alpha-spirooxirane-pa0554520 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54520
Molecular Formula : C20H24O3
Molecular Weight : 312.4
stdClass Object ( [pname] => Exemestane β-Spirooxirane [catalogue_number] => PA 05 54530 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 312.4 [form] => C20H24O3 [cas] => 152764-31-3 [pslug] => 152764-31-3-exemestane-beta-spirooxirane-pa0554530 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54530
stdClass Object ( [pname] => 1,2-α-Epoxy Exemestane [catalogue_number] => PA 05 54540 [category_ids] => ,81,78,70,82,87, [chemical_name] => [weight] => 312.4 [form] => C20H24O3 [cas] => 159354-61-7 [pslug] => 159354-61-7-1-2-alpha-epoxy-exemestane-pa0554540 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54540
stdClass Object ( [pname] => Exemestane 17-α Isomer [catalogue_number] => PA 05 54550 [category_ids] => ,81,78,70,82,87, [chemical_name] => [weight] => 312.4 [form] => C20H24O3 [cas] => NA [pslug] => exemestane-17-alpha-isomer-pa0554550 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54550
stdClass Object ( [pname] => Exemestane 17-β Isomer [catalogue_number] => PA 05 54560 [category_ids] => ,81,78,70,82,87, [chemical_name] => [weight] => 312.4 [form] => C20H24O3 [cas] => NA [pslug] => exemestane-17-beta-isomer-pa0554560 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54560
stdClass Object ( [pname] => 6α-(Methoxymethyl)androsta-1,4-dien-3,17-dione [catalogue_number] => PA 05 54570 [category_ids] => ,81,78,70,82,87, [chemical_name] => [weight] => 328.45 [form] => C21H28O3 [cas] => 881896-95-3 [pslug] => 881896-95-3-6-alpha-methoxymethyl-androsta-1-4-dien-3-17-dione-pa0554570 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54570
Molecular Formula : C21H28O3
Molecular Weight : 328.45
stdClass Object ( [pname] => Exemestane Diol Impurity [catalogue_number] => PA 05 54600 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 330.42 [form] => C20H26O4 [cas] => 184972-11-0 [pslug] => 184972-11-0-exemestane-diol-impurity-pa0554600 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54600
Molecular Formula : C20H26O4
Molecular Weight : 330.42
stdClass Object ( [pname] => 6-Methyleneandrost-4-ene-3,17-dione-19-d3 [catalogue_number] => PA STI 061390 [category_ids] => ,98,78,70,82,87, [chemical_name] => [weight] => 301.44 [form] => C20H23D3O2 [cas] => NA [pslug] => 6-methyleneandrost-4-ene-3-17-dione-19-d3-pasti061390 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA STI 061390
Molecular Formula : C20H23D3O2
Molecular Weight : 301.44
stdClass Object ( [pname] => Exemestane-19-d3 [catalogue_number] => PA STI 040460 [category_ids] => ,78,70,82,87,98, [chemical_name] => [weight] => 299.42 [form] => C20H21D3O2 [cas] => NA [pslug] => exemestane-19-d3-pasti040460 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA STI 040460
Molecular Formula : C20H21D3O2
Molecular Weight : 299.42
stdClass Object ( [pname] => 6-Hydroxymethyl Exemestane-d3 [catalogue_number] => PA STI 047740 [category_ids] => ,98,76,75,78,70,82,87, [chemical_name] => [weight] => 315.42 [form] => C20H21D3O3 [cas] => NA [pslug] => 6-hydroxymethyl-exemestane-d3-pasti047740 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA STI 047740
Molecular Formula : C20H21D3O3
Molecular Weight : 315.42
stdClass Object ( [pname] => 17β-Hydroxy Exemestane-d3 [catalogue_number] => PA STI 049020 [category_ids] => ,98,76,75,78,70,82,87, [chemical_name] => [weight] => 301.44 [form] => C20H23D3O2 [cas] => NA [pslug] => 17-beta-hydroxy-exemestane-d3-pasti049020 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA STI 049020
stdClass Object ( [pname] => 17β-Hydroxy Exemestane-d3 17-O-β-D-Glucuronide [catalogue_number] => PA STI 049030 [category_ids] => ,95,98,76,75,78,70,82,87, [chemical_name] => [weight] => 477.56 [form] => C26H31D3O8 [cas] => NA [pslug] => 17-beta-hydroxy-exemestane-d3-17-o-beta-d-glucuronide-pasti049030 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA STI 049030
Molecular Formula : C26H31D3O8
Molecular Weight : 477.56
stdClass Object ( [pname] => 17β-Hydroxy Exemestane-d3 17-O-β-D-Glucuronide 2,3,4-Triacetate Methyl Ester [catalogue_number] => PA STI 049040 [category_ids] => ,95,98,76,75,78,70,82,87, [chemical_name] => [weight] => 617.7 [form] => C33H39D3O11 [cas] => NA [pslug] => 17-beta-hydroxy-exemestane-d3-17-o-beta-d-glucuronide-2-3-4-triacetate-methyl-ester-pasti049040 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA STI 049040
Molecular Formula : C33H39D3O11
Molecular Weight : 617.7
stdClass Object ( [pname] => Exemestane - Impurity B [catalogue_number] => PA 05 54020 [category_ids] => ,70,82,87, [chemical_name] => [weight] => 314.43 [form] => C20H26O3 [cas] => 184972-09-6 [pslug] => 184972-09-6-exemestane-impurity-b-pa0554020 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 54020
Molecular Formula : C20H26O3
Molecular Weight : 314.43
stdClass Object ( [pname] => Delta-1,6-methylene -17-hydroxyprogest [catalogue_number] => PA 05 0541005 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 340.46 [form] => C22H28O3 [cas] => 1204325-01-8 [pslug] => 1204325-01-8-delta-1-6-methylene-17-hydroxyprogest-pa050541005 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541005
Molecular Formula : C22H28O3
Molecular Weight : 340.46
stdClass Object ( [pname] => 6-Hydroxymethyl Exemestane [catalogue_number] => PA 05 0541006 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 312.41 [form] => C20H24O3 [cas] => 152764-26-6 [pslug] => 152764-26-6-6-hydroxymethyl-exemestane-pa050541006 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541006
Molecular Weight : 312.41
stdClass Object ( [pname] => 17-Beta-Hydroxy Exemestane Epoxide [catalogue_number] => PA 05 0541007 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 314.43 [form] => C20H26O3 [cas] => 1331732-05-8 [pslug] => 1331732-05-8-17-beta-hydroxy-exemestane-epoxide-pa050541007 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541007
stdClass Object ( [pname] => (8R,9S,10R,13S,14S)-6-(Methoxymethyl)-10,13-dimethyl-7,8,9,10,11,12,13,14,15,16-decahydro-3H-cyclopenta[a]phenanthrene-3,17(6H)-dione [catalogue_number] => PA 05 0541008 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 328.45 [form] => C21H28O3 [cas] => 861398-01-8 [pslug] => 861398-01-8-8r-9s-10r-13s-14s-6-methoxymethyl-10-13-dimethyl-7-8-9-10-11-12-13-14-15-16-decahydro-3h-cyclopenta-a-phenanthrene-3-17-6h-dione-pa050541008 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541008
stdClass Object ( [pname] => 16-Methyleneandrosta-1,4-diene-3,17-dione [catalogue_number] => PA 05 0541009 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 296.41 [form] => C20H24O2 [cas] => 2467590-81-2 [pslug] => 2467590-81-2-16-methyleneandrosta-1-4-diene-3-17-dione-pa050541009 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541009
Molecular Weight : 296.41
stdClass Object ( [pname] => Pregna-1,4-Diene-3-One, 17,20-Dihydroxy-6-Methylene [catalogue_number] => PA 05 0541010 [category_ids] => ,76,75,78,70,82,87, [chemical_name] => [weight] => 342.48 [form] => C22H30O3 [cas] => 1204325-02-9 [pslug] => 1204325-02-9-pregna-1-4-diene-3-one-17-20-dihydroxy-6-methylene-pa050541010 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541010
Molecular Formula : C22H30O3
Molecular Weight : 342.48
stdClass Object ( [pname] => (8R,9S,10R,13S,14S)-10,13-Dimethyl-3,17-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthrene-6-carbaldehyde [catalogue_number] => PA 05 0541011 [category_ids] => ,87,75,76,78,70,82, [chemical_name] => [weight] => 312.41 [form] => C20H24O3 [cas] => NA [pslug] => 8r-9s-10r-13s-14s-10-13-dimethyl-3-17-dioxo-6-7-8-9-10-11-12-13-14-15-16-17-dodecahydro-3h-cyclopenta-a-phenanthrene-6-carbaldehyde-pa050541011 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541011
stdClass Object ( [pname] => (8R,9S,10R,13S,14S)-17-Hydroxy-10,13-dimethyl-3-oxo-8,9,10,11,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthrene-6-carbaldehyde [catalogue_number] => PA 05 0541012 [category_ids] => ,87,75,76,78,70,82, [chemical_name] => [weight] => 312.41 [form] => C20H24O3 [cas] => NA [pslug] => 8r-9s-10r-13s-14s-17-hydroxy-10-13-dimethyl-3-oxo-8-9-10-11-12-13-14-15-16-17-decahydro-3h-cyclopenta-a-phenanthrene-6-carbaldehyde-pa050541012 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541012
stdClass Object ( [pname] => (8R,9S,10R,13S,14S)-3-Ethoxy-10,13-dimethyl-6-methylene-1,2,3,6,7,8,9,10,11,12,13,14,15,16-tetradecahydro-17H-cyclopenta[a]phenanthren-17-one [catalogue_number] => PA 05 0541013 [category_ids] => ,87,75,76,78,70,82, [chemical_name] => [weight] => 328.5 [form] => C22H32O2 [cas] => NA [pslug] => 8r-9s-10r-13s-14s-3-ethoxy-10-13-dimethyl-6-methylene-1-2-3-6-7-8-9-10-11-12-13-14-15-16-tetradecahydro-17h-cyclopenta-a-phenanthren-17-one-pa050541013 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541013
Molecular Formula : C22H32O2
Molecular Weight : 328.5
stdClass Object ( [pname] => ((6S,8R,9S,10R,13S,14S)-10,13-dimethyl-3,17-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-6-yl)methyl methanesulfonate [catalogue_number] => PA 05 0541014 [category_ids] => ,87,75,76,78,70,82, [chemical_name] => [weight] => 392.51 [form] => C21H28O5S [cas] => NA [pslug] => 6s-8r-9s-10r-13s-14s-10-13-dimethyl-3-17-dioxo-6-7-8-9-10-11-12-13-14-15-16-17-dodecahydro-3h-cyclopenta-a-phenanthren-6-yl-methyl-methanesulfonate-pa050541014 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 05 0541014
Molecular Formula : C21H28O5S
Molecular Weight : 392.51
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