英文别名Olopatadine Impurity 12; 6,11-dihydro-11-oxo-dibenz[b,e]oxepin-2-acetate,methyl ester; METHYL 6,11-DIHYDRO-11-OXO-DIBENZ[B,E]OXEPIN-2-ACETATE; 6,11-Dihydro-11-oxo-dibenz[b,e]oxepin-2-acetic acid methyl ester; 6,11-dihydro-11-oxo-dibenz[b,e]oxepin-2-acetate; Methyl (11-oxo-6,11-dihydrodibenzo[b,e]oxepin-2-yl)acetate; methyl 2-(11-oxo-6H-benzo[c][1]benzoxepin-2-yl)acetate; Dibenz[b,e]oxepin-2-acetic acid, 6,11-dihydro-11-oxo-, methyl ester 
