Antitumor-indolopyrrolocarbazolderivater

摘要

This invention relates to compounds of the general formula or pharmaceutically salts thereof, wherein R<1> and R<2> each represent an OH group, R<1> is located at the 1- or 2-position, R<2> is located at the 10- or 11-position, R<2> is located at the 11-position when R<1> is located at the 1-position, and R<2> is located at the 10-position when R<1> is located at the 2-position. The compounds of the present invention have an excellent antitumor effect and are hence useful as antitumor agents in the field of medicine.