3,4-Diethoxy-3-cyclobutene-1,2-dione 

5231-87-8

Cyclobutenedione, diethoxy-; 1,2-Diethoxy-1-cyclobutene-3,4-dione; 1,2-Diethoxy-3,4-dioxocyclobut-1-ene; 1,2-Diethoxycyclobutenedione; 3,4-Diethoxycyclobutene-1,2-dione; Diethoxycyclobut-3-ene-1,2-dione; Diethoxycyclobutenedione; Diethyl squarate; 3,4-diethoxycyclobut-3-ene-1,2-dione;