InterviewSolution
`-CH_2-UNDERSET(OC_2H_5)underset(|)(CH)-` `-CH_2-underset(C_6H_5)underset(|)(CH)-` `-CH_2-underset(COOC_2H_5)underset(|)(CH)` `-CH_2-underset(COOCH_3)underset(|)(CH)-`
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