title: Constituents of Cissus quadrangularis.
abstract: Two new iridoids 6-O-[2,3-dimethoxy]-trans-cinnamoyl catalpol (1) and 6-O-meta-methoxy-benzoyl catalpol (2) along with a known iridoid picroside 1 (3), two stilbenes quadrangularin A (4) and pallidol (5), quercitin (6), quercitrin (7), beta-sitosterol (8) and beta-sitosterol glycoside (9) were isolated from Cissus quadrangularis Linn. The compounds 3 and 7 are first reported from this plant. The structures were elucidated by analysis of their spectroscopic data and by direct comparison with literature. This is the first reported occurrence of iridoids in C. quadrangularis.
authors.affiliation: Medicinal and Process Chemistry Division, Central Drug Research Institute, Lucknow, India.
authors.forename: Geetu
authors.initials: G
authors.lastname: Singh
authors.forename: Preeti
authors.initials: P
authors.lastname: Rawat
authors.forename: Rakesh
authors.initials: R
authors.lastname: Maurya
mesh_terms: D032422:Cissus / Q000737:chemistry*; D039823:Iridoids / Q000737:chemistry* / Q000302:isolation & purification*; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry
chemical_list: D039823:Iridoids