题目内容

下列叙述正确的是()

A. 吗啡3位酚羟基甲基化,则镇痛活性和成瘾性均下降
B. 吗啡17位氮上去甲基,镇痛活性下降
C. 吗啡3、6位二羟基均乙酰化,则镇痛活性和成瘾性均增加
D. 吗啡17位氮上甲基变为其他烷基,镇痛活性和成瘾性均下降

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