title: Two novel dimeric indole alkaloids from the leaves and twigs of Psychotria henryi.
abstract: Two novel dimeric indole alkaloids were isolated from the leaves and twigs of Psychotria henryi. Their structures were established by chemical and spectroscopic methods. Compound 1 was a novel dimeric tryptamine-related alkaloid that contained an unprecedented decacyclic ring system, and compound 2 featured a pyrido[3,4-b]indole moiety adjacent to a pyrrolidinoindole skeleton. The absolute configurations of compounds 1 and 2 were determined by calculation of electronic circular dichroism (ECD) using density functional theory (DFT).
authors.affiliation: State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Liu
authors.forename: Jun-Song
authors.initials: JS
authors.lastname: Wang
authors.forename: Xiao-Bing
authors.initials: XB
authors.lastname: Wang
authors.forename: Ling-Yi
authors.initials: LY
authors.lastname: Kong
mesh_terms: D026121:Indole Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D032069:Psychotria / Q000737:chemistry*
chemical_list: D026121:Indole Alkaloids; D010936:Plant Extracts