24-Ethyl Ivermectin

NA

(1R,4S,5'S,6R,6'R,8R,10Z,12S,13S,14Z,20R,21R,24S)-6'-[(2S)-Butan-2-yl]-5'-ethyl-21,24-dihydroxy-12-[(2R,4S,5S,6S)-5-[(2S,4S,5S,6S)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-11,13,22-trimethylspiro[3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6,2'-oxane]-2-one; 24-ethylivermectin B1a;