Interpretation:
Among the given structures, the structures that represent esters have to be chosen.
Concept Introduction:
Carbonyl groups are the one which contain a double bond between carbon and oxygen atom.
If a hydroxyl group is attached to a carbonyl group means it is known as carboxyl group. This can be represented as shown below,
The general structure of ester can be given as shown below,
The functional group of ester compound can be shown as given below,
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