DC-88A derivatives.

摘要

DC-88A derivatives represented by the general formula: <CHEM> wherein X represents hydrogen or CO2R<1> (in which R<1> represents hydrogen, a straight-chain or branched alkyl having 1 to 4 carbon atoms, allyl, or benzyl); and <CHEM> represents <CHEM> have an excellent anti-tumor activity and are useful as anti-tumor agents.