Task: Text Categorization
Input (English): These can be formed in a basic solution by alpha haloketones and can also be formed by reacting a nitrile and an alcohol in an acidic environment, known respectively as the Favorskii Rearrangement and the Pinner Reaction. The Baeyer-Villiger reaction can also produce these compounds from ketones in the presence of a peroxy-acid. The presence of two of these functional groups on a molecule allows for the formation of beta-keto ones via the Dieckmann condensation, which is a modification of the Claisen Condensation. For 10 points, name this functional group, a carboxylic acid whose terminal hydrogen is replaced with an alkyl group, which are useful for their various fragrant odors.
Output (English): Science