title: Pollenopyrroside A and B, novel pyrrole ketohexoside derivatives from bee-collected Brassica campestris pollen.
abstract: Pollenopyrroside A and pollenopyrroside B, novel pyrrole ketohexoside derivatives, were isolated from the extract of Bee-collected Brassica campestris pollen. Their structures were elucidated by spectroscopic analysis (UV, IR, MS, NMR and X-ray) and chemical evidence. Pollenopyrrosides A and B represent a novel carbon skeleton with a six-six and five-six member dioxaspirocycle bearing nitrogen atom, respectively.
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, People's Republic of China.
authors.forename: Juan-Li
authors.initials: JL
authors.lastname: Guo
authors.forename: Zi-Ming
authors.initials: ZM
authors.lastname: Feng
authors.forename: Ya-Jun
authors.initials: YJ
authors.lastname: Yang
authors.forename: Zhi-Wu
authors.initials: ZW
authors.lastname: Zhang
authors.forename: Pei-Cheng
authors.initials: PC
authors.lastname: Zhang
mesh_terms: D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry* / Q000302:isolation & purification / Q000633:toxicity; D001516:Bees; D001937:Brassica / Q000737:chemistry*; D045744:Cell Line, Tumor; D018360:Crystallography, X-Ray; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D011058:Pollen / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry* / Q000302:isolation & purification / Q000633:toxicity
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D011758:Pyrroles; C552657:pollenopyrroside A; C552658:pollenopyrroside B