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Wirongrong Kaweetripob Chulabhorn Mahidol Siriporn Wongbundit Pittaya Tuntiwachwuttikul Somsak Ruchirawat Hunsa Prawat 《Tetrahedron》2018,74(2):316-323
Sesterterpene, erectusolide A (1), six phenolic alkenes, erectuseneols A?F (2–7) and nine known compounds, luffalactone (8), luffariolide E (9), (6E)- and (6Z)-neomanoalide 24,25-diacetates (10 and 11), 6,6-dimethylundecane-2,5,10-trione (12), threo- and erythro-cavernosines (13 and 14), (4E,6E)-dehydromanoalide (15), echinoclerodane A (16), were isolated from the marine sponge Hyrtios erectus. Compound 13 was isolated for the first time from a natural source. The structures of these compounds were elucidated on the basis of spectroscopic analysis. The phenolic alkenes 3 and 7, the sesterterpenes 8–11 and 15, and compounds 12–14 were evaluated for cytotoxic activities against six cancer cell lines, MOLT-3, HepG2, HeLa, HuCCA-1, A549, and MDA-MB-231. 相似文献
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Wisanu ManeeratThunwadee Ritthiwigrom Sarot CheenprachaUma Prawat Surat Laphookhieo 《Tetrahedron letters》2011,52(26):3303-3305
Two new dimeric carbazole alkaloids, clausenawallines A and B, were isolated from the roots of Clausena wallichii. Their structures were elucidated by spectroscopic methods. Clausenawalline A was evaluated for its biological activities [anti-malaria (IC50 2.46 μg/mL), anti-TB (MIC 12.50 μg/mL)] and cytotoxicity against three human cancer cell lines [KB (IC50 7.87 μg/mL), MCF7 (IC50 25.43 μg/mL), and NCI-H187 (IC50 10.97 μg/mL)]. 相似文献
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Hunsa Prawat Chulabhorn Mahidol Wirongrong Kaweetripob Sawangjitt Wittayalai Somsak Ruchirawat 《Tetrahedron》2012,68(34):6881-6886
6′-Iodoaureol, an iodo–sesquiterpene hydroquinone, 6′-aureoxyaureol, a bissesquiterpene hydroquinone, and four brominated indole alkaloids 3–6 were isolated from the Thai sponge Smenospongia sp. Additionally, four known sesquiterpene hydroquinones 12–15, ten known brominated indole alkaloids 7–11, 17–18, and 20–22, ergosterol, and furospinosulin-1 were also isolated. Compound 1 is the first reported iodo–sesquiterpene hydroquinone and compounds 7–11 were isolated for the first time from natural sources. The structures were characterized by spectroscopic analyses as well as comparison with literature data. Several of these metabolites were evaluated for cytotoxic activity against seven tumor cell lines. 相似文献
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Hunsa Prawat Chulabhorn MahidolSawangjitt Wittayalai Pakamas IntachoteTripetch Kanchanapoom Somsak Ruchirawat 《Tetrahedron》2011,67(31):5651-5655
Five nitrogenous sesquiterpenes having an isonitrile [(−)-axisonitrile-3], a formamide [(+)-axamide-3, axamide-2 and (3S*,5R*,6R*,9R*)-3-formamido-1(10)-cadinene], and an amine [(−)-halichamine] functionality were isolated from the Thai marine sponge Halichondria sp., together with two steroids, ergosterol and ergosterol peroxide. (−)-Axisonitrile-3 was isolated from the natural source for the first time, while (+)-axamide-3 and (−)-halichamine were new metabolites. The structures of these compounds were elucidated on the basis of their spectroscopic data and by chemical transformations. All sesquiterpenes were tested for their cytotoxic activity against six cancer cell lines (HeLa, HuCCA-1, A549, MOLT-3, HepG2, MDA-MB231). Only (−)-axisonitrile-3 showed strong activity to the HepG2 cell line with an IC50 value of 1.3 μM. 相似文献
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Tuntiwachwuttikul P Butsuri Y Sukkoet P Prawat U Taylor WC 《Natural product research》2008,22(11):962-968
A novel anthraquinone, 1,3-dihydroxy-5,6-dimethoxy-2-methoxymethyl-9,10-anthraquinone (9) and a new natural product, 2-hydroxymethyl-1-methoxy-9,10-anthraquinone (8) were isolated from the roots of Prismatomeris malayana together with seven known anthraquinones, tectoquinone (1), 1-hydroxy-2-methyl-9,10-anthraquinone (2), rubiadin (3), rubiadin-1-methyl ether (4), 1,3-dihydroxy-5,6-dimethoxy-2-methyl-9,10-anthraquinone (5), nordamnacanthal (6), and damnacanthal (7). Their structures were determined on the basis of spectroscopic data. Some of the anthraquinones were tested for anticancer, antifungal, and antimalarial activities. 相似文献
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Athikomkulchai S Prawat H Thasana N Ruangrungsi N Ruchirawat S 《Chemical & pharmaceutical bulletin》2006,54(2):262-264
Two new compounds, 3'-(4'-hydroxy-3',5'-dimethoxyphenyl)-propyl benzoate (1) and 3'-(4'-hydroxyphenyl)-propyl benzoate (3) together with known compounds, 3'-(4'-hydroxy-3'-methoxyphenyl)-propyl benzoate (2), poilaneic acid (4), farnesyl acetone (5) and 4-hydroxybenzaldehyde (6) were isolated and identified from the branches of Croton hutchinsonianus. Their structures were determined by spectroscopic methods. The three phenylpropyl benzoates (1-3) were found to exhibit antifungal activity against Candida albicans (IC(50) 5.36-11.41 microg/ml). Compounds 1-2 (IC(50) 2.11-4.95 microg/ml) exhibited potent but non-selective activity against the enzymes cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) whereas 3 (IC(50) 1.88 microg/ml) preferentially inhibited the enzyme COX-2. 相似文献
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Wichanee Bankeeree Rinji Akada Pongtharin Lotrakul Hunsa Punnapayak Sehanat Prasongsuk 《Applied biochemistry and biotechnology》2018,184(3):919-934
From three cell-associated β-xylosidases produced by Aureobasidium pullulans CBS 135684, the principal enzyme was enriched to apparent homogeneity and found to be active at high temperatures (60–70 °C) over a pH range of 5–9 with a specific activity of 163.3 units (U) mg?1. The enzyme was thermostable, retaining over 80% of its initial activity after a 12-h incubation at 60 °C, with half-lives of 38, 22, and 10 h at 60, 65, and 70 °C, respectively. Moreover, it was tolerant to xylose inhibition with a K i value of 18 mM. The K m and V max values against p-nitrophenyl-β-d-xylopyranoside were 5.57 ± 0.27 mM and 137.0 ± 4.8 μmol min?1 mg?1 protein, respectively. When combining this β-xylosidase with xylanase from the same A. pullulans strain, the rate of black liquor xylan hydrolysis was significantly improved by up to 1.6-fold. The maximum xylose yield (0.812 ± 0.015 g g?1 dry weight) was obtained from a reaction mixture containing 10% (w/v) black liquor xylan, 6 U g?1 β-xylosidase and 16 U g?1 xylanase after incubation for 4 h at 70 °C and pH 6.0. 相似文献
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