Wiktionary
acetanisole
n. (context organic chemistry English) A particular aromatic compound used as a food additive.
Wikipedia
Acetanisole
Acetanisole is an aromatic chemical compound with an aroma described as sweet, fruity, nutty, and similar to vanilla. In addition Acetanisole can sometimes smell like butter or caramel. It is used as a cigarette additive, a fragrance, and a flavoring in food.
Acetanisole is found naturally in castoreum, the glandular secretion of the beaver.
Acetanisole can be prepared synthetically by Friedel-Crafts acylation of anisole with acetyl chloride: