Which compound has the greatest number of peaks (signals) in its 1H^1\text{H}1H NMR spectrum?
Diethyl carbonate, (CH3CH2O)2CO\text{(CH}_3\text{CH}_2\text{O)}_2\text{CO}(CH3CH2O)2CO
Propyl ethanoate, CH3COOCH2CH2CH3\text{CH}_3\text{COOCH}_2\text{CH}_2\text{CH}_3CH3COOCH2CH2CH3
Dimethyl propanedioate, CH2(COOCH3)2\text{CH}_2\text{(COOCH}_3\text{)}_2CH2(COOCH3)2
Ethyl methanoate, HCOOCH2CH3\text{HCOOCH}_2\text{CH}_3HCOOCH2CH3
