Identify the product (A) and the name of the | vedclass

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(B) The reaction of salicylaldehyde with acetic anhydride $(Ac_2O)$ in the presence of sodium acetate $(AcONa)$ is a classic example of the Perkin rea

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(B) The reaction of salicylaldehyde with acetic anhydride $(Ac_2O)$ in the presence of sodium acetate $(AcONa)$ is a classic example of the Perkin reaction. In this reaction,the aldehyde group of salicylaldehyde undergoes condensation with the acetic anhydride to form an intermediate,which subsequently undergoes intramolecular cyclization by the loss of a water molecule $(-H_2O)$ to form the cyclic ester known as coumarin ($2H$-chromen-$2$-one).

Identify the product $(A)$ and the name of the reaction for the given transformation:

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