title: Supercritical carbon dioxide extraction and quantification of bioactive neolignans from Magnolia virginiana flowers.
abstract: Magnolia virginiana L. flowers were extracted sequentially with supercritical CO2, supercritical CO2 modified with 5% chloroform, and supercritical CO2 modified with 5% methanol at 40 degrees C and 400 atm. The biologically active neolignans 3,5'-diallyl-2',4-dihydroxybiphenyl (1), 4,4'-diallyl-2,3'-dihydroxybiphenyl ether (2), 5,5'-diallyl-2,2'-dihydroxybiphenyl (3), and 3,5'-diallyl-2'-hydroxy-4-methoxybiphenyl (4) present in these extracts, were quantified by HPLC using photodiode array detection. Compounds 1-4 present in one gram dried flowers were found to be 0.11, 1.16, 1.66, and 0.42%, respectively. This is the first report of the supercritical extraction and quantification of bioactive neolignans from Magnolia virginiana L. flowers.
authors.forename: A
authors.initials: A
authors.lastname: Chandra
authors.forename: M G
authors.initials: MG
authors.lastname: Nair
mesh_terms: D002245:Carbon Dioxide; D002851:Chromatography, High Pressure Liquid; D017705:Lignans / Q000302:isolation & purification*; D013056:Spectrophotometry, Ultraviolet; D014197:Trees / Q000737:chemistry*
chemical_list: D017705:Lignans; D002245:Carbon Dioxide