42617-24-3 Antibiotic RP 21190 Flambamycin RP-21190 beta-D-Mannopyranoside, O-4-C-acetyl-6-deoxy-2,3-O-methylenehexopyranosylidene-(1-3-4)-2-O-(2-methyl-1-oxopropyl)-alpha-L-lyxopyranosyl O-2,6-dideoxy-4-O-(3,5-dichloro-4-hydroxy-2-methoxy-6-methylbenzoyl)-beta-D-arabino-hexopyranosyl-(1-4)-O-2,6-dideoxy-D-ribo-hexopyranosylidene-(1-3-4)-O-6-deoxy-3-C-methyl-beta-D-mannopyranosyl-(1-3)-O-6-deoxy-4-O-methyl-beta-D-galactopyranosyl-(1-4)-2,6-di-O-methyl-