title: Two novel trimeric resveratrol derivatives from Cotylelobium lanceolatum.
abstract: Two new resveratrol (= 5-[(E)-2-(4-hydroxyphenyl)ethenyl]benzene-1,3-diol) trimers, cotylelophenols A (1) and B (2), were isolated from the stem of Cotylelobium lanceolatum (Dipterocarpaceae), together with ten known resveratrol oligomers (3-12). The structures of the isolates were established on the basis of spectroscopic analyses, including a detailed NMR spectroscopic investigation of 1 under different conditions. Compound 1 is the first resveratrol trimer with a rearranged 4-hydroxyphenyl group. Four possible biogenetic pathways towards resveratrol oligomers are proposed (Scheme).
authors.affiliation: Gifu Prefectural Institute of Health and Environmental Sciences, 1-1 Naka-fudogaoka, Kakamigahara 504-0838, Japan. zvn00510@nifty.ne.jp
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Ito
authors.forename: Zulfiqar
authors.initials: Z
authors.lastname: Ali
authors.forename: Miyuki
authors.initials: M
authors.lastname: Furusawa
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Iliya
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Nakaya
authors.forename: Jin
authors.initials: J
authors.lastname: Murata
authors.forename: Dedy
authors.initials: D
authors.lastname: Darnaedi
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Oyama
authors.forename: Munekazu
authors.initials: M
authors.lastname: Iinuma
mesh_terms: D020448:Ericales / Q000737:chemistry*; D015394:Molecular Structure; D000077185:Resveratrol; D013267:Stilbenes / Q000737:chemistry*
chemical_list: D013267:Stilbenes; D000077185:Resveratrol