1-Naphthacenecarboxylic acid, 2-ethyl-1,2,3,4,6,11-hexahydro-2,4,5,7,12-pentahydroxy-6,11-dioxo-, methyl ester, (1R-(1alpha,2beta,4beta))- 132677-57-7 21288-60-8 E-Rhodomycinone Epsilon-rhodomycinone NSC 196524 Rhodomycinone