title: Antifeedant triterpenoids from the seeds and bark of Lansium domesticum cv Kokossan (Meliaceae).
abstract: Two tetranortriterpenoids, kokosanolide A (1) and C (2) were isolated from the seeds and three onoceranoid-type triterpenoids: kokosanolide B (3), 8,14-secogammacera-7,14-diene-3,21-dione (4) and a 1.5:0.5 mixture of 8,14-secogammacera-7,14(27)-diene-3,21-dione (5) and compound 4 were isolated from the bark of kokossan (Lansium domesticum). Complete 1H- and 13C-NMR data of the triterpenoids 1-5 are reported. The triterpenoids' structures were elucidated primarily by means of high field 1D- and 2D-NMR, IR and HRMS spectral data. Triterpenoids 1-5 exhibited moderate to strong antifeedant activity against the fourth instar larvae of Epilachna vigintioctopunctata.
authors: Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jatinangor 45363, Indonesia.
authors: Tri
authors: T
authors: Mayanti
authors: Roekmiati
authors: R
authors: Tjokronegoro
authors: Unang
authors: U
authors: Supratman
authors: Mat Ropi
authors: MR
authors: Mukhtar
authors: Khalijah
authors: K
authors: Awang
authors: A Hamid A
authors: AH
authors: Hadi
mesh_terms: D000818:Animals; D005247:Feeding Behavior / Q000187:drug effects*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D029582:Meliaceae / Q000737:chemistry* / Q000196:embryology; D008958:Models, Molecular; D024301:Plant Bark / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D014315:Triterpenes / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D014315:Triterpenes