120381-88-6 CRA-B Dechromose-A chrommycin A3 Olivomycin D, 3D-O-(4-O-acetyl-2,6-dideoxy-3-C-methyl-alpha-L-arabino-hexopyranosyl)-3A-O-de(2,6-dideoxy-4-O-methyl-beta-L-lyxo-hexopyranosyl)-7-methyl-