102647-16-5 A 64922 A-649 Antibiotic A-649 Antibiotic A-649-22 Bristol A-649 C-1228 NSC 38270 Olivomycin D, 3(sup B)-O-(2',6-dideoxy-3-C-methyl-4-O-(2-methyl-1-oxopropyl)-alpha-L-arabino-hexopyranosyl)-