(1,2,3a,4,8,14,15,17-Octahydro-12-hydroxy-11-methoxy-1,3a-dimethyl-2,8,14,15,17-pentaoxo(1)benzopyrano(2',3':6,7)naphth(2,1-g)oxazolo(3,2-b)isoquinolin-1-yl)methyl 3-methylbutanoate 128969-89-1 Butanoic acid, 3-methyl-, (1,2,3a,4,8,14,15,17-octahydro-12-hydroxy-11-methoxy-1,3a-dimethyl-2,8,14,15,17-pentaoxo(1)benzopyrano(2',3':6,7)naphth(2,1-g)oxazolo(3,2-b)isoquinolin-1-yl)methyl ester Citreamicin zeta LL E19085 zeta LL-E19085zeta