Vanillin is a flavoring agent which occurs naturally in the vanilla bean,the seed of an orchid. Identify the functional group circled. 
Definitions:
ADH
An abbreviation for Antidiuretic Hormone, a hormone that helps regulate the body's balance of fluids by reducing the production of urine.
Development Time
The period required to progress or complete a project, process, or stage of development.
Microwave Environment
A setting or condition where the presence or application of microwave radiation is significant, often related to telecommunications or cooking.
Larval Samples
Samples collected from the larval stage of an organism, used for scientific research or study.
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