Three new α-hydroxydihydrochalcones, (αR)-α,3,4,2',4'-pentahydroxydihydrochalcone, (αR)-3'-C-β-D-xylopyranosyl-α,3,4,2',4'-pentahydroxydihydrochalcone, and (αR)-3'-O-β-D-xylopyranosyl-α,3,4,2',4'-pentahydroxydihydrochalcone, together with the known coatline B [(αR)-3'-C-β-D-glucopyranosyl-α,2',3,4',4-pentahydroxydihydrochalcone], were isolated from the bark and trunks of Eysenhardtia polystachya and their structures were deduced by spectral methods. One of the isolates displayed insecticidal activity.
insecticidal activity, Leguminosae, Eysenhardtia polystachya, C- and O-glycosyl α-hydroxydihydrochalcones
Publication DOI: 10.1016/S0031-9422(98)00576-7Journal NLM ID: 0151434Publisher: Elsevier
Institutions: Centro de Investigaciones Quı́micas de la Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Cuernavaca 62210, Morelos, Mexico, Instituto de Quı́mica de la Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510, Mexico
Methods: 13C NMR, 1H NMR, EI-MS, IR, UV, acetylation, CD, RP-HPLC, TCL, cytotoxicity assay, HMBC, HMQC, DEPT, antimicrobial assay, COSY, NOESY, HCl hydrolysis, HETCOR, insecticidal activity
Found