title: New prenylflavans from Cyperus conglomeratus.
abstract: In addition to luteolin and its 7-methyl ether, the CH2Cl2-MeOH (1:1) extract of Cyperus conglomeratus afforded two new prenylflavans identified as 7,3'-dihydroxy-5,5'-dimethoxy-8-prenylflavan and 5,7,3'-trihydroxy-5'-methoxy-8-prenylflavan. The structures were established by CIMS, 1H-NMR, 13C-NMR, H-H COSY, HMQC, HMBC and DEPT analysis.
authors.affiliation: Natural Products Chemistry Department, National Research Centre, Dokki 12622, Cairo, Egypt. aymanfarag2001@yahoo.com
authors.forename: Ayman F
authors.initials: AF
authors.lastname: Abdel-Razik
authors.forename: Mahmoud I
authors.initials: MI
authors.lastname: Nassar
authors.forename: Ezzel-Din A
authors.initials: ED
authors.lastname: El-Khrisy
authors.forename: Abdel-Aziz M
authors.initials: AA
authors.lastname: Dawidar
authors.forename: Tom J
authors.initials: TJ
authors.lastname: Mabry
mesh_terms: D029786:Cyperus / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D047311:Luteolin / Q000302:isolation & purification
chemical_list: C507794:5,7,3'-trihydroxy-5'-methoxy-8-prenylflavan; C507795:7,3'-dihydroxy-5,5'-dimethoxy-8-prenylflavan; D005419:Flavonoids; D047311:Luteolin