6-Hydroxy-8-[(1R)-1-hydroxy-2-[[2-(4-methoxyphenyl)-1,1-dimethylethyl]amino]ethyl]-2H-1,4-benzoxazin-3(4H)-one
奥达特罗
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6-氨基-2-甲基-4H-苯并[1,4]咯嗪-3-酮