NOVEL NK374186 ANALOGUES OR PHARMACOLOGICALLY ACCEPTABLE SALTS THEREOF

摘要

NK374186 analogues such as NK374186A3 of formula (I). NK374186D3 and NK374186E3 can be obtained by culturing NK374186-producing bacteria. Other NK374186 analogues are obtained by chemically derivatizing NK374186B. These analogues and pharmacologically acceptable salts thereof are useful as the active ingredients of antitumor drugs and immunoregulators.