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(单选题) 甲氧苄氨嘧啶的化学名为 ( )
A、5-[[3,4,5-trimethoxyphenyl]methyl]-2,6-pyrimidinediamineB、5-[[3,4,5-trimethoxyphenyl]methyl]-4,6-pyrimidinediamineC、5-[[3,4,5-trimethoxyphenyl]methyl]-2,4-pyrimidinediamineD、5-[[3,4,5-trimethoxyphenyl]ethyl]-2,4-pyrimidinediamineE、5-[[3,4,5-trimethyphenyl]methyl]-2,4-pyrimidinediamine
