Molecular networking-based strategy for the discovery of polyacetylated 18-norspirostanol saponins from Trillium tschonoskii maxim.
作者:Dan Li、Hui Liu、Wei Ni、Wei-Lie Xiao、Li He、Zhen-Yu Guo、Xu-Jie Qin、Hai-Yang Liu
DOI:10.1016/j.phytochem.2019.112125
日期:2019.12
Nine undescribed polyacetylated 18-norspirostanol saponins, trilliumosides A‒J, were obtained after a guidance based on a molecular networking strategy from the rhizomes of Trilliumtschonoskii. Their structures were established by analysis of comprehensive spectroscopic data and chemical methods after their isolation in pure form. All isolated saponins were evaluated for their cytotoxicities against
九种未描述的聚乙酰化 18-去甲螺甾醇皂苷,延龄草苷 A-J,是在基于延龄草根茎分子网络策略的指导下获得的。它们的结构是通过分析综合光谱数据和化学方法在纯形式分离后建立的。评估了所有分离的皂苷对五种选定的人类癌细胞系(Huh7、A549、MCF-7、HepG2 和 MOLT-4)的细胞毒性以及对 RAW264.5 中脂多糖 (LPS) 刺激的 NO 产生模型的抗炎作用。 7 巨噬细胞。延龄草苷 D 对 MOLT-4 细胞系显示出显着的细胞毒性,IC50 值为 1.0 ± 0.1 μM,而延龄草苷 H 和 I 对 NO 的产生显示出显着的抗炎作用,抑制率为 56.3 ± 1.5 和 56.2 ± 2。
Stable Axially Chiral Isomers of Arylnaphthalene Lignan Glycosides with Antiviral Potential Discovered from <i>Justicia procumbens</i>
Arylnaphthalenelignans (ANLs) were known to have axial chirality due to the biphenyl skeleton with hindered rotation at the single bond. However, the stable ANL atropisomers have not been isolated from nature until the present study. Phytochemical separation of the methanol extract of the stems and barks of Justicia procumbens led to the isolation of 11 ANL glycosides including four pairs of new atropisomers
Synthesis, separation and NMR spectral analysis of methyl apiofuranosides
作者:Tadashi Ishii、Masayuki Yanagisawa
DOI:10.1016/s0008-6215(98)00262-6
日期:1998.12
Abstract Methyl apiofuranosides were prepared by methanolysis of d -apiose. Four methyl apiofuranosides were separated by ion-exclusion and normal phase chromatography and their structures were characterized by 1 H and 13 C NMR spectroscopy. The composition of methyl apiofuranosides was almost the same as that of d -apiose in D 2 O.
摘要通过d-apiose的甲醇水解反应制备了甲基apiofuranosides。通过离子排斥法和正相色谱法分离出四种甲基呋喃呋喃糖苷,并通过1 H和13 C NMR光谱对它们的结构进行了表征。甲基apiofuranosides的组成与D 2 O中的d -apiose几乎相同。
Nine triterpenoid saponins were isolated from the leaves and stems of Schefflera arboricola. The saponins were characterised, on the basis of chemical and spectral evidence, as 3-O-[alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucuronopyranosyl] oleanolic acid, 3-O-[alpha-L-rhamnopyranosyl-(1-->4)-beta-D-glucuronopyranosyl] echinocystic acid, 3-O-[beta-D-apiofuranosyl-(1-->4)-beta-D-glucuronopyranosyl]
Sesquiterpenoids, phenolic and lignan glycosides from the roots and rhizomes of Clematis hexapetala Pall. and their bioactivities
作者:Lu Cai、Si-Yuan Shao、Shao-Wei Han、Shuai Li
DOI:10.1016/j.bioorg.2020.104312
日期:2020.11
Approximately 17 compounds were isolated from a 60% EtOH aqueous extract of the roots and rhizomes of Clematis hexapetala Pall., including three new guaianolide sesquiterpenoids with 5/7/5-fused rings and 3S-configuration (1-3), five new prenylated tetra-substituted phenolic glycosides (4-8) with 6/6-fused 9H-benzopyran skeleton (5) and 6/7-fused 7,10-dihydro-benzoxepin skeleton (6-8), one new isoferulyl