title: Calyciphyllines A and B, two novel hexacyclic alkaloids from Daphniphyllum calycinum.
abstract: [structure: see text] Two types of Daphniphyllum alkaloids with unprecedented fused-hexacyclic ring systems, calyciphyllines A (1) and B (2), have been isolated from the leaves of Daphniphyllum calycinum (Daphniphyllaceae), and the structures and relative stereochemistry were elucidated on the basis of spectroscopic data.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Morita
authors.forename: Jun'ichi
authors.initials: J
authors.lastname: Kobayashi
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D008958:Models, Molecular; D018515:Plant Leaves / Q000737:chemistry; D011083:Polycyclic Compounds / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism
chemical_list: D011083:Polycyclic Compounds; C479143:calyciphylline A; C479142:calyciphylline B