83378-70-5 Antibiotic RH 5012C D-Streptamine, O-6-amino-6-deoxy-L-glycero-D-galacto-heptopyranosylidene-(1-2-3)-O-beta-D-mannoypyranosyl-(1-5)-2-deoxy-N(sup 3)-methyl- RH 5012C