Synonyms:
18-methylestr-4-en-3,17-dione ; 13-ethyl-gon-4-ene-3,17-dione ; ethylgonendione ; (+)-13-b-ethylgon-4-ene-3,17-dione ; 18-methyl-19-norandrost-4-ene-3,17-dione ; 18-methyl-4-estrene-3,17-dione ; gon-4-ene-3,17-dione,13-ethyl- ; 18-methyl-estr-4-ene-3,17-dione ; d-ethylgonendione ; 13-ethyl-gona-4-ene-3,17-dione