title: Octanorcucurbitane and cucurbitane triterpenoids from the tubers of Hemsleya endecaphylla with HIV-1 inhibitory activity.
abstract: Two new cucurbitacins, endecaphyllacins A (1) and B (2), together with six known analogues (3-8), were isolated from the tubers of Hemsleya endecaphylla. The structures of 1 and 2 were elucidated by NMR and MS spectroscopic analysis. The relative stereochemistry of 1 was determined by single-crystal X-ray diffraction. Compound 4 (cucurbitacin B) showed potent anti-HIV-1 in C8166 cells (EC=0.09 microg/mL) with a selectivity index of 16.7.
authors: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Yunnan, People's Republic of China.
authors: Jian-Chao
authors: JC
authors: Chen
authors: Gao-Hong
authors: GH
authors: Zhang
authors: Zhong-Quan
authors: ZQ
authors: Zhang
authors: Ming-Hua
authors: MH
authors: Qiu
authors: Yong-Tang
authors: YT
authors: Zheng
authors: Liu-Meng
authors: LM
authors: Yang
authors: Kai-Bei
authors: KB
authors: Yu
mesh_terms: D019380:Anti-HIV Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D018360:Crystallography, X-Ray; D019662:Cucurbitaceae / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D015497:HIV-1 / Q000187:drug effects*; D015394:Molecular Structure; D035281:Plant Tubers / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*
chemical_list: D019380:Anti-HIV Agents; D004365:Drugs, Chinese Herbal; D014315:Triterpenes; C527634:endecaphyllacin A; C527635:endecaphyllacin B