26215-59-8 53421-05-9 6673-97-8 Acetic acid, thio-, S-ester with 4',5'-dihydro-7alpha-mercaptospiro(androst-4-ene-17,2'(3'H)-furan)-one SC 15983 SPIROXASONE Spiro(androst-4-ene-17,2'(3'H)-furan)-3-one, 4',5'-dihydro-7alpha-mercapto-, acetate Spiro(androst-4-ene-17,2'(3'H)-furan)-3-one, 7-(acetylthio)-4',5'-dihydro-, (7alpha,17beta)-