Write the structural formula for aspirin. label the ester group and the carboxylic acid group

The formula of the asprin is C₉H₈O₄. Asprin is also called as acetylsalicylic acid which is used as a drug in medical treatments. It is a synthetic derivative of salicylic acid which is extracted from willow bark.
As the functional groups, asprin has 3 groups as carboxylic acid group, ester group and aromatic ring. The structure is as the image.

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