title: Two new isoflavonoids from the roots of Dalbergia congesta (Grah).
abstract: A systematic examination of the roots of Dalbergia congesta, yielded a new oligomeric isoflavonoid (1), a new tetramethoxy isoflavone (2) along with two known compounds, an isoflavone dalspinin (3) and a benzophenone, cearoin (4). On the basis of chemical and spectral evidences, compounds 1 and 2 were determined to be 5,7-dihydroxy-6,4'-dimethoxy-6'[2''-hydroxy-2''(2''',5'''-dimethoxy neoflavonyl) ethenyl] isoflavone (dalcongestin) and 5,7-dihydroxy-2',3',5',6'-tetramethoxy isoflavone, respectively.
authors.affiliation: Pelican Biotech and Chemical Labs, 415-A, Vayalar P.O. Cherthala, Alappuzha, Kerala 688 536, India.
authors.forename: Priya R
authors.initials: PR
authors.lastname: Rao
authors.forename: Manoj C
authors.initials: MC
authors.lastname: Narayanan
authors.forename: Sethuraman M
authors.initials: SM
authors.lastname: Gopalakrishnan
authors.forename: Nagarajan N
authors.initials: NN
authors.lastname: Shanmugam
mesh_terms: D035782:Dalbergia / Q000737:chemistry*; D007529:Isoflavones / Q000737:chemistry* / Q000302:isolation & purification*; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry*
chemical_list: C511979:5,7-dihydroxy-2',3',5',6'-tetramethoxy isoflavone; D007529:Isoflavones; C511980:dalcongestin