122535-63-1 Butanoic acid, 3-methyl-, (1,2,8,14,15,17-hexahydro-16-hydroxy-11,12-dimethoxy-1,1-dimethyl-2,8,14,15,17-pentaoxo(1)benzopyrano(2',3':6,7)naphth(2,1-g)oxazolo(3,2-b)isoquinolin-3a(4H)-yl)methyl ester Citreamicin alpha LL E19085alpha