2-Acetyl-1-pyrroline 1 [2-AP; IUPAC name 5-acetyl-3,4-
dihydro-2H-pyrrole; also 1-(3,4-dihydro-2H-pyrrol-5-yl)-
ethanone] was identified for the first time as the most
important flavor compound of cooked rice.1 Since then, the
flavor compound has been identified in a great variety of
processed and cooked food products, especially in various
rice varieties, both fragrant and nonfragrant varieties.2 The
content of 2-AP was shown to be positively correlated with