9,12-Epoxy-1H-diindolo(1,2,3-fg:3',2',1'-kl)pyrrolo(3,4-i)(1,6)benzodiazocine-10-carboxylic acid, 2,3,9,10,11,12-hexahydro-5,10,16-trihydroxy-9-methyl-1-oxo-, methyl ester, (9S-(9alpha,10alpha,12alpha))-