Identification of 2-acetylpyridine in Xiangjing-8618 rice and in Yahonkaoluo leaves

2-Acetylpyridine was established, for the first time, as the characteristic aroma compound of two plants, Yahonkaoluo leaves (a spice, Acanthaceae strobilanthus sp.), wild in Mengla county of Yunnan province of China and Xiangjing-8618 rice (a scented rice, Oryza sativa L.), cultivated in the south of Jiangsu province of China, by means of ethylene glycol pre-extraction, porapak Q trapping, GC–MS identification, sniffing technique after capillary column and verification by authentic compound. Ethylene glycol, as a pre-extracting solvent, efficently extracted a micro-basic fraction containing the “scented rice”-like aroma compound in Yahonkaoluo leaves.