2'-deoxy-D-erythro-pentopyranosyl-σ-pyrromycinone

(2R,4S)-4-((2S,4S,5R)-4,5-Diacetoxy-tetrahydro-pyran-2-yloxy)-2-ethyl-2,5,7,12-tetrahydroxy-6,11-dioxo-1,2,3,4,6,11-hexahydro-naphthacene-1-carboxylic acid methyl ester