107807-18-1 5,12-Naphthacenedione, 8-ethyl-7,8,9,10-tetrahydro-1,4,6,7,8,11-hexahydroxy-10-((2,3,6-trideoxy-3-(dimethylamino)-alpha-L-lyxo-hexopyranosyl)oxy)-, (7R-(7alpha,8beta,10beta))- Obelmycin A