title: Biotransformation of glabratephrin, a rare type of isoprenylated flavonoids, by Aspergillus niger.
abstract: Microbial transformation of glabratephrin, the major isolated compound from Tephrosia purpurea, afforded pseudosemiglabrin. The formation of the transformed compound seems to be performed via ring opening-closure of a five-membered ring causing transformation from a spiro into a fused system. The structure of the transformed compound was determined by comprehensive NMR studies, including DEPT, COSY, HMQC, NOE and MS.
authors.affiliation: Department of Chemistry, Aswan-Faculty of Science, South Valley University, Aswan, Egypt. abuelhamd2002@yahoo.com
authors.forename: Abou-El-Hamd H
authors.initials: AE
authors.lastname: Mohamed
authors.forename: Ali K
authors.initials: AK
authors.lastname: Khalafallah
authors.forename: Afifi H
authors.initials: AH
authors.lastname: Yousof
mesh_terms: D001234:Aspergillus niger / Q000378:metabolism*; D001711:Biotransformation; D002852:Chromatography, Ion Exchange; D005419:Flavonoids / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy
chemical_list: D005419:Flavonoids; C532409:glabratephrin