51909-61-6 Antibiotic G-52 BRN 1334233 D-Streptamine, O-2-amino-2,3,4,6-tetradeoxy-6-(methylamino)-alpha-D-glycero-hex-4-enopyranosyl-(1-4)-O-(3-deoxy-4-C-methyl-3-(methylamino)-beta-L-arabinopyranosyl-(1-6))-2-deoxy- G 52 G-52 Sch-17726