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11楼2013-07-17 15:11:18
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12楼2013-07-17 15:13:40
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13楼2013-07-17 15:15:31
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,应该是这个:C11H23C(O)-NH2CH2CH2CH3
,最后写一个看对不对,C11H23C(O)-NHCH2CH2CH3