title: Volatile constituents of Semnostachya menglaensis Tsui.
abstract: Semnostachya menglaensis Tsui (Acanthaceae) is a rare plant indigenous to Mengla in the tropical rainforest of the Xishuangbanna prefecture in the south of Yunnan province, People's Republic of China. When the leaves are crushed, a characteristic smell of basmati rice or pandan leaves develops. Their hexane extract, prepared from a specimen growing in a greenhouse of the botanical garden of the Kunming Institute of Botany, contains 1-(3,4,5,6-tetrahydro-2-pyridyl)-1-propanone (41.2%) and 1-(1,4,5,6-tetrahydro-2-pyridyl)-1-propanone (37.5%) which constitute the main part of the volatile compounds. Minor components are 1-(3,4,5,6-tetrahydro-2-pyridyl)-1-ethanone (4.9%), 1-(1,4,5,6-tetrahydro-2-pyridyl)-1-ethanone (4.8%), 1-(2-piperidyl)-1-propanone (5.2%), 1-octen-3-ol (3.2%), 1-octen-3-one (1.9%), and 3-octanol and 1-(2-pyridyl)-1-propanone in trace amounts.
authors.affiliation: Corporate R&D Division, Firmenich SA, P.O. Box 239, CH-1211 Geneva 8, Switzerland.
authors.forename: Regula
authors.initials: R
authors.lastname: Naef
authors.forename: Alain
authors.initials: A
authors.lastname: Velluz
authors.forename: Fabienne
authors.initials: F
authors.lastname: Mayenzet
authors.forename: Christian
authors.initials: C
authors.lastname: Starkenmann
authors.forename: Han-Dong
authors.initials: HD
authors.lastname: Sun
mesh_terms: D027901:Acanthaceae / Q000737:chemistry*; D002681:China; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D009812:Odorants / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D011725:Pyridines / Q000032:analysis; D014835:Volatilization
chemical_list: D011725:Pyridines