61230-27-1 Antibiotic U 48266 BRN 0967992 BUTANOIC ACID, N-METHYLHISTIDYL-beta-((1-CARBOXY-2-(1H-IMIDAZOL-4-YL)ETHYL)AMINO Butanoic acid, N-methylhistidyl-beta-((1-carboxy-2-(1H-imidazol-4-yl)ethyl)amino)-alpha-amino- Feldamycin