title: Indolopyridoquinazoline alkaloid from Leptothyrsa sprucei.
abstract: The indolopyridoquinazoline alkaloid, 3-hydoxyrutaecarpine, was isolated from Leptothyrsa sprucei, along with 8-methoxypsoralen, 5-methoxypsoralen, imperatorin, isoimperatorin, kaempferol 3-O-alpha-L-rhamnopyranoside, clematine and cnidioside B. The usefulness of the gradient 1H-15N HMBC NMR spectroscopy in the structure elucidation of 3-hydroxyrutaecarpine is noted.
authors.affiliation: National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, The University of Mississippi, University, MS, USA.
authors.forename: X C
authors.initials: XC
authors.lastname: Li
authors.forename: D C
authors.initials: DC
authors.lastname: Dunbar
authors.forename: H N
authors.initials: HN
authors.lastname: ElSohly
authors.forename: L A
authors.initials: LA
authors.lastname: Walker
authors.forename: A M
authors.initials: AM
authors.lastname: Clark
mesh_terms: D007211:Indoles / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D011799:Quinazolines / Q000737:chemistry / Q000302:isolation & purification*; D027821:Rutaceae / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: C442179:3-hydoxyrutaecarpine; D007211:Indoles; D011799:Quinazolines