Physiologically active substances TKR2449, process for producing the same, and microorganism

摘要

The present invention has for its object to provide novel biologically active substances which is of value as a therapeutic agent for fungal infections and immune disorders. This invention is related to a biologically active substance TKR2449 analog(s) which is represented by the following general formula (A);(In the formula, R1, R2 and R3 are the same or differ each other, and each represents hydrogen or an alkyl group of carbon number of 1 to 4. R4 is a linear or branched alkyl or alkenyl group of carbon number of 1 to 8.).