Group of antitumor compounds and method for producing the same

Abstract

A mold belonging to the genus Ascochyta is cultivated with a medium to obtain a culture. A compound having a structure represented by the following formula and having an antitumor activity, which is capable of forming a tautomeric equilibrium mixture composed of tautomers, is collected from the culture, or a mixture of the tautomers is collected from the culture.

Dependencies are inferred from the claim text.