The structure of acetyl salicylic acid, or aspirin, is shown to the right.Which functional groups does an aspirin molecule contain? Check all that apply.

Aspirin contains a carboxylic acid group: a carbonyl (C=O) bonded to an –OH on the same carbon. It also contains an ester group, where an oxygen links a carbonyl-containing part of the molecule to another carbon. The carbonyls are not ketones or aldehydes, and the –OH is part of the carboxylic acid rather than an alcohol.

AI-written and checked against the verified answer.