title: Three novel cyclospirobifuranocoumarins, cyclorivulobirins A-C, from Pleurospermum rivulorum.
abstract: Three novel cyclospirobifuranocoumarins, cyclorivulobirins A-C (1-3), were isolated from the underground part of Pleurospermum rivulorum. They are characterized as three stereoisomers having a different configuration at the C-2 and C-2' position resulting from the condensation of two heraclenol units, respectively, on the basis of chemical and spectral methods.
authors.forename: M
authors.initials: M
authors.lastname: Taniguchi
authors.forename: Y Q
authors.initials: YQ
authors.lastname: Xiao
authors.forename: K
authors.initials: K
authors.lastname: Baba
mesh_terms: D019661:Apiaceae / Q000737:chemistry*; D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry
chemical_list: D003374:Coumarins