1,11-Dihydroxyaklavinone 1-Naphthacenecarboxylic acid, 2-ethyl-1,2,3,4,6,11-hexahydro-2,4,5,7,10,12-hexahydroxy-6,11-dioxo-, methyl ester, (1R-(1alpha,2beta,4beta))- 21204-32-0 Epsilon-isorhodomycinone