单项选择题
下列化合物的1HNMR谱,各组峰均为单峰的为()
A. CH3CH2COOCH2CH3
B. CH3OOCCH2COOCH3
C. CH3OOCCH2CH2COOCH3
D. CH3CH2OCH2CH3
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单项选择题
A. CH3CH2COOCH2CH3
B. CH3OOCCH2COOCH3
C. CH3OOCCH2CH2COOCH3
D. CH3CH2OCH2CH3
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