Which one is the correct molecule of the given properties of IR Spectroscopy?

1. $\ce{CH3CH=CHCO2CH3}$
2. $\ce{CH3COOCH=CHCH3}$


$\pu{2950 cm-1}, \ \pu{2870 cm-1}, \ \pu{1740 cm-1}$ are the observed peaks.


No peaks observed $\pu{1700-1500 cm-1}$.


The formula of the molecule is $\ce{C5H8O2}$.


**My pre-answer** is the first option. Because $\pu{1500-1700 cm-1}$ includes unsaturated carbons.


