Indolopyrrolocarbazole derivative and antitumor agents

The present invention has the formula: [wherein, R represents an unsubstituted pyridyl group, a furyl group or a thienyl group, m represents an integer of 1 to 3, G represents a beta-D-glucopyranosyl group, Indoropiroro the substitution position of the hydroxy groups on the carbazole ring is position 1 and 11-position or 2-position and the compound or a pharmaceutically acceptable salt thereof represented by a is] 10-position, and an antitumor agent containing the same as an active ingredient .