title: Preparative high-performance liquid chromatographic separation of naphthodianthrones from St. John's Wort.
abstract: St. John's Wort (Hypericum perforatum), a perennial flowering plant, has been used medicinally for thousands of years and has most recently been identified as an effective treatment for mild to moderate depression and neuralgic disorders. This work presents a procedure for the isolation of naphthodianthrones from St. John's Wort by an accelerated extraction and separation of marker compounds by preparative high-performance liquid chromatography (HPLC) with photodiode array detection. The accelerated extraction method minimizes the extraction time and increases the yield, and the marker compounds obtained by preparative HPLC are of 98% purity. The compounds are characterized by liquid chromatography-mass spectrometry (electrospray ionization) and NMR spectra.
authors.affiliation: Regional Research Laboratory, Canal Road, Jammu-180001, India. purisc2004@yahoo.com
authors.forename: S
authors.initials: S
authors.lastname: Puri
authors.forename: G
authors.initials: G
authors.lastname: Handa
authors.forename: A K
authors.initials: AK
authors.lastname: Kalsotra
authors.forename: V K
authors.initials: VK
authors.lastname: Gupta
authors.forename: A S
authors.initials: AS
authors.lastname: Shawl
authors.forename: O P
authors.initials: OP
authors.lastname: Suri
authors.forename: G N
authors.initials: GN
authors.lastname: Qazi
mesh_terms: D000873:Anthracenes / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D020902:Hypericum / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy
chemical_list: D000873:Anthracenes