Spectroscopy

Which compound has the greatest number of peaks (signals) in its $1H^1\text{H}$ NMR spectrum?

Methyl propanoate, $CH3CH2COOCH3\text{CH}_3\text{CH}_2\text{COOCH}_3$

Propyl ethanoate, $CH3COOCH2CH2CH3\text{CH}_3\text{COOCH}_2\text{CH}_2\text{CH}_3$

Dimethyl carbonate, $CH3OCOOCH3\text{CH}_3\text{OCOOCH}_3$

Diisopropyl ether, $(CH3)2CHOCH(CH3)2(\text{CH}_3)_2\text{CH}\text{OCH}(\text{CH}_3)_2$

Which compound has the greatest number of peaks (signals) in its $1H^1\text{H}$ NMR spectrum?

Methyl propanoate, $CH3CH2COOCH3\text{CH}_3\text{CH}_2\text{COOCH}_3$

Propyl ethanoate, $CH3COOCH2CH2CH3\text{CH}_3\text{COOCH}_2\text{CH}_2\text{CH}_3$

Dimethyl carbonate, $CH3OCOOCH3\text{CH}_3\text{OCOOCH}_3$

Diisopropyl ether, $(CH3)2CHOCH(CH3)2(\text{CH}_3)_2\text{CH}\text{OCH}(\text{CH}_3)_2$

Spectroscopy Questions