Results 101 to 110 of about 329 (142)
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Triterpenoids from Picrasma quassioides with their cytotoxic activities
Phytochemistry Letters, 2020Abstract Eleven triterpenoids, including a new tirucallane-type triterpenoid and a new natural product, were isolated from Picrasma quassioides. Their structures were elucidated by extensive spectroscopic analysis. All isolates were evaluated for their cytotoxic activities against Hep3B and HepG2 cell lines.
Ming Bai +5 more
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Cytotoxic Alkaloids from the Wood of Picrasma quassioides
Journal of the Korean Society for Applied Biological Chemistry, 2009Six alkaloid compounds were isolated from the chloroform soluble fraction of the methanolic extract of the wood of Picrasma quassioides Benn (Simarobaceae) as the cytotoxic components against the tumor cell lines, U937 and HepG2. The compounds were identified as 4,9-dimethoxy-1-vinyl-γ-carboline (1), 1-carbomethoxy-β-carboline (2), 4,5-dimethoxycanthin-
Mei-Xiang, Jiang, Ying-Jun, Zhou
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Antioxidant Effects of Picrasma quassioides and Chamaecyparis obtusa (S. et Z.) ENDL Extracts [PDF]
Journal of Life Science, 2012 In our study, we investigated the antioxidant effect of methanol extract from the leaves of Picrasma quassioides (PQ) and Chamaecyparis obtuse (S. et Z.) ENDL (CO).
In-Seon Lee, Mi-Hee Yu
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β‐Carboline alkaloids from the stems of Picrasma quassioides
Magnetic Resonance in Chemistry, 2010AbstractFive new β‐carboline alkaloids, 6,12‐dimethoxy‐3‐(2‐hydroxylethyl)‐β‐carboline (1), 3,10‐dihydroxy‐β‐carboline (2), 6,12‐dimethoxy‐3‐(1‐hydroxylethyl)‐β‐carboline (3), 6,12‐dimethoxy‐3‐(1,2‐dihydroxylethyl)‐β‐carboline (4), and 6‐methoxy‐3‐(2‐hydroxyl‐1‐ethoxylethyl)‐β‐carboline (5), and two new natural products, 6‐methoxy‐12‐hydroxy‐3 ...
Wei-Hua, Jiao +6 more
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Seven Alkaloids from Picrasma quassioides and Their Cytotoxic Activities
Chemistry of Natural Compounds, 2014A new alkaloid, 6-hydroxy-β-carboline-1-carboxylic acid (1), together with six known alkaloids, including β-carboline-1-carboxylic acid (2), β-carboline-1-propanoic acid (3), 1-methoxycarbonyl-β-carboline (4), 3-methylcanthin-5,6-dione (5), 5-hydroxy-4-methoxycanthin-6-one (6), and 4,5-dimethoxycanthin-6-one (7), were isolated from the stem of Picrasma
Zheng-Quan Lai +8 more
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Fitoterapia, 2016
Three new C20 quassinoids nigakilactone P (1), picraqualide F (2), nigakilactone Q (3), along with eight known quassinoids (4-11), were isolated from the 95% EtOH extract of the stems of Picrasma quassioides. The structures of the new compounds were elucidated by means of HRESIMS and different NMR techniques.
Jian, Xu +7 more
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Three new C20 quassinoids nigakilactone P (1), picraqualide F (2), nigakilactone Q (3), along with eight known quassinoids (4-11), were isolated from the 95% EtOH extract of the stems of Picrasma quassioides. The structures of the new compounds were elucidated by means of HRESIMS and different NMR techniques.
Jian, Xu +7 more
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Enantiomeric β-carboline dimers from Picrasma quassioides and their anti-hepatoma potential
Phytochemistry, 2019Four pairs of enantiomeric β-carboline alkaloids, (+/-)-kumudine A-D, along with their biosynthesis-related compound kumudine E, were obtained from the stems of Picrasma quassioides. Their structures, including the absolute configurations, were determined via extensive spectroscopic data combined with electronic circular dichroism (ECD) spectroscopic ...
Wen-Yu Zhao +7 more
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Biological Activities of Fractions from Methanolic Extract of Picrasma quassioides
Journal of Plant Biology, 2009Antioxidant, antidiabetes, and anticancer activities of fractions (water, hexane, EtOAc, and BuOH) from methanolic (MeOH) extract of Picrasma quassioides were evaluated in vitro. Among the four fractions, BuOH fraction showed cytotoxic activity on the human stomach carcinoma cells (NCI-N87) without cytotoxic effect on the human normal kidney cells (293)
Yu Yin +3 more
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Two new β-carboline alkaloids from the stems of Picrasma quassioides
Archives of Pharmacal Research, 2018Two new β-carboline alkaloids, 1-acetyl-4-methoxy-8-hydroxy-β-carboline (1) and 1-acetyl-4,8-dimethoxy-β-carboline (2), together with 10 known compounds; seven β-carboline alkaloids (3-9), two canthin-6-one alkaloids (10 and 11), and one quassinoid (12) were isolated from the stems of Picrasma quassioides.
Hyun Sook, Kwon +5 more
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A pair of new tirucallane triterpenoid epimers from the stems of Picrasma quassioides
Chinese Journal of Natural Medicines, 2019A pair of new tirucallane triterpenoid epimers, picraquassins M and N (1> and 2), were isolated from the stems of Picrasma quassioides (D. Don) Benn. Their structures were determined based on comprehensive spectroscopic and X-ray crystallographic analyses.
Jie, Zhang +8 more
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