22-Oxoleurosine 4'-Desoxy-3'alpha,4'alpha-epoxyvincristin 54022-49-0 F-Leurosine Formyl-leurosine Leuroformine N-Demethyl-N-formylleurosine N-Formylleurosine NSC 269419 Vincaleukoblastine, 4'-deoxy-3',4'-epoxy-22-oxo-, (3'-alpha,4'-alpha)- (9CI) Vinformida [INN-Spanish] Vinformide Vinformide [INN] Vinformidum [INN-Latin] f-Leu