82029-27-4 87578-99-2 Antibiotic EM 5519 Antibiotic Y 16482-alpha Antibiotic Y 16482alpha EM 5519 Propanamide, 2-amino-N-((6,7,9,10,13,14,14a,15-octahydro-1,7-dihydroxy-2,11-dimethoxy-3,12,16-trimethyl-10,13-dioxo-6,15-imino-5H-isoquino(3,2-b)(3)benzazocin-9-yl)methyl)- Safracin B