title: Isolation and synthesis of a new chromenochalcone and a new chromene from Orthosiphon glabratus.
abstract: Chemical investigation on Orthosiphon glabratus afforded 10 compounds, among which a chromenochalcone and a chromene are new. The structures of the new constituents were settled from their 1D- and 2D-NMR spectra. The synthesis of these two compounds and some of their analogues have been accomplished.
authors.affiliation: Organic Chemistry Division-I, Indian Institute of Chemical Technology, Hyderabad, India. biswanathdas@yahoo.com
authors.forename: Biswanath
authors.initials: B
authors.lastname: Das
authors.forename: Ponnaboina
authors.initials: P
authors.lastname: Thirupathi
authors.forename: Rathod Aravind
authors.initials: RA
authors.lastname: Kumar
authors.forename: Akella Venkata Subramanya
authors.initials: AV
authors.lastname: Sarma
authors.forename: Shaik Jilani
authors.initials: SJ
authors.lastname: Basha
mesh_terms: D001578:Benzopyrans / Q000737:chemistry / Q000302:isolation & purification*; D047188:Chalcones / Q000737:chemistry / Q000302:isolation & purification*; D007194:India; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D031342:Orthosiphon / Q000737:chemistry*
chemical_list: C540724:1-(2,2-dimethyl-5-hydroxy-2H-chromen-6-yl)-3-(2',3',4'-trimetho-xyphenyl)propenone; C540725:6-acetyl-3,4-dihydro-2,2-dimethyl-5-O-prenyl-chromene; D001578:Benzopyrans; D047188:Chalcones