121245-07-6 2-Naphthacenecarboxylic acid, 6,6a,7,10,10a,11-hexahydro-6a,7,12-trihydroxy-3,8,10a-trimethoxy-1-methyl-6,10,11-trioxo-, methyl ester, (6aR-(6aalpha,7alpha,10aalpha))- Tetracenomycin X