title: Alkaloids from Melodinus yunnanensis.
abstract: Ten monoterpenoid indole alkaloids, namely meloyine, 19S-methoxytubotaiwine N₄-oxide, 16,19-epoxy-Δ¹⁴-vincanol, 14β-hydroxymeloyunine, meloyunine, Δ¹⁴-vincamenine N₄-oxide, 16β,21β-epoxy-vincadine, 14β,15β-20S-quebrachamine, 3-oxo-voaphylline, 2α,7α-dihydroxy-dihydrovoaphylline, and 32 known alkaloids were isolated from leaves and twigs of Melodinus yunnanensis. Their structures were elucidated based on 1- and 2-D NMR, FTIR, UV, and MS spectroscopic data. Meloyine I showed weak cytotoxic activity against four human cancer cell lines: MCF-7 breast cancer, SMMC-7721 hepatocellular carcinoma, HL-60 myeloid leukemia, and A-549 lung cancer.
authors: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China. xhcai@mail.kib.ac.cn
authors: Xiang-Hai
authors: XH
authors: Cai
authors: Yan
authors: Y
authors: Li
authors: Ya-Ping
authors: YP
authors: Liu
authors: Xiao-Ning
authors: XN
authors: Li
authors: Mei-Fen
authors: MF
authors: Bao
authors: Xiao-Dong
authors: XD
authors: Luo
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D029062:Apocynaceae / Q000737:chemistry*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D018922:HL-60 Cells; D006801:Humans; D061986:MCF-7 Cells; D008958:Models, Molecular; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D046948:Secologanin Tryptamine Alkaloids / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D046948:Secologanin Tryptamine Alkaloids