2-Acetyl-1-pyrroline, abbreviated 2AP, with the IUPAC name 1-(3,4-dihydro-2H-pyrrol-5-yl)ethanone, is an aroma compound and flavor that gives white bread, jasmine rice and basmati rice, the spice pandan (Pandanus amaryllifolius), and bread flowers (Vallaris glabra) their customary smell. Many observers describe the smell as similar to \"hot, buttered popcorn\", and it is credited for lending this odor to the scent of binturong (bearcat) urine. 2-Acetyl-1-pyrroline and its structural homolog, 6-acetyl-2,3,4,5-tetrahydropyridine of similar smell, can be formed by Maillard reactions during heating of food such as the baking of bread dough. Both compounds have odor thresholds below 0.06 ng/l.

CAS：85213-22-5
中文别名：1-(3,4-二氢-2H-吡咯-5-基)乙酮;
英文别名：2-acetyl-4,5-dihydro-3H-pyrrole;1-(4,5-dihydro-3H-pyrrol-2-yl)ethanone;2-acetyl-1-pyrrolidine;2-ACETYL-1-PYRROLINE;ETHANONE,1-(3,4-DIHYDRO-2H-PYRROL-5-YL);
分子式：C6H9NO
分子量：111.142
精确质量：111.068
Psa：29.43
Logp：0.2458

密度：1.09g/cm3
沸点：182.9ºC at 760 mmHg
闪点：66.2ºC
折射率：1.531

海关编码：2933990090