20072-28-0

(8R)-8aα,9,12aα,13-Tetrahydro-5,9β-dihydroxy-8α-methyl-8H-10-oxa-1,7b-diazabenzo[5,6]cyclohepta[1,2,3-jk]fluorene-2,12-dicarboxylic acid 12-methyl ester