DERIVATIVES OF CERVINOMYCIN ANTIBIOTICS AND PROCESS FOR THEIR PREPARATION.

摘要

Cervinomycin derivs. of formula (I) are new: where at least one of R1, R2 and R3 is acyl or alkyl and the rest are H; R4 is H or alkyl; B is a ring moiety of formula (II) or (III). Reaction of cervinomycin A2 (I, R1 = R4 = H, B is (II)) or cervinomycin A1 (I, R1 = R2 = R3 = R4 = H, B is (III)) with an alkylating or acylating agent.