The mass spectrum of an ester (M=102) shows some obvious peaks at m/z 74 (64%), m/z 71 (50%), m/z 59 (22%) and m/z 43 (100%), which of the following structures is the most consistent with this data?
A、CH3CH2COOC2H5;
B、(CH3)2CHCOOCH3;
C、CH3(CH2)2COOCH3;
D、CH3COOCH2CH2CH3
发布时间：2025-07-19 07:42:02
