abstract |
PURPOSE: Methylenomycin A derivatives of formula I(R is lower alkyl, aralkyl having benzene rings with or without substituents, heterocycle-alkyl having heterocycles with or without substituents) and their pharmaceutically acceptable salts, e.g. 5,6-epoxy-2, 5, 6-trimethyl-4-oxocyclopenta [C] pyrrolidin1-one. n COPYRIGHT: (C)1978,JPO&Japio |