chau minh

Two new triterpene glycosides, namely holothurin A3 (1) and A4 (2) were isolated from the methanol extract of the sea cucumber,Holothuria scabra, with their structures elucidated from the spectroscopic evidence (1D NMR, 2D NMR, ESI-MS and HRESI-MS). Compounds1 and2 were found to be strongly cytotoxic to both cancer cell lines, KB and Hep-G2, with 50% inhibitory concentrations (IC50) of 0.87 and 0.32 μg/mL (for compound 1) and of 1.12 and 0.57 μg/mL (for compound2), respectively.

Six phenolic constituents, 2-methoxybenzyl benzoate (1), negletein (2), 2’,3’-dihydroxy-4’,6’-dimethoxydihydrochalcone (3), 5, 6-dihydroxy-7-methoxy-dihydroflavone (4), astilbin (5), and quercitrin (6) were isolated from the methanol extract of the dried leaves ofDesmos chinensis. Their structures were elucidated from spectral and chemical data. Of these constituents, compounds 2 (IC50: 3.89 ± 0.39 μM) and3 (IC50: 9.77 ± 0.26 μM) exhibited potent inhibitory activity against nuclear factor of activated T cells (NFAT) transcription factor, and compound1 (IC50: 28.4 ± 2.62 μM) exhibited moderate inhibitory activity.

A new monoterpene glycoside, 6’-O-β-D-glucopyranosylalbiflorin (1), and four known compounds; albiflorin (2), 6’-O-benzoylalbiflorin (3), paeoniflorin (4) and benzoyl paeoniflorin (5), were isolated from the methanolic extract of the roots ofPaeonia lactiflora Pall.. Their chemical structures were completely elucidated using a combination of 2D NMR techniques (COSY, HMQC and HMBC) and HRESI-MS analyses. To investigate the bioactivities of these compounds, their effects on the differentiation of osteoblastic MC3T3-E1 cells were tested. Compound 1 (0.01-10 μM) significantly increased the alkaline phosphatase activity and nodules mineralization of MC3T3-E1 cells compared to those of the control (Pin vitro and may contribute to the prevention for osteoporosis.

Two new triterpene glycosides, namely holothurin A3 (1) and A4 (2) were isolated from the methanol extract of the sea cucumber,Holothuria scabra, with their structures elucidated from the spectroscopic evidence (1D NMR, 2D NMR, ESI-MS and HRESI-MS). Compounds1 and2 were found to be strongly cytotoxic to both cancer cell lines, KB and Hep-G2, with 50% inhibitory concentrations (IC50) of 0.87 and 0.32 μg/mL (for compound 1) and of 1.12 and 0.57 μg/mL (for compound2), respectively.

Six phenolic constituents, 2-methoxybenzyl benzoate (1), negletein (2), 2’,3’-dihydroxy-4’,6’-dimethoxydihydrochalcone (3), 5, 6-dihydroxy-7-methoxy-dihydroflavone (4), astilbin (5), and quercitrin (6) were isolated from the methanol extract of the dried leaves ofDesmos chinensis. Their structures were elucidated from spectral and chemical data. Of these constituents, compounds 2 (IC50: 3.89 ± 0.39 μM) and3 (IC50: 9.77 ± 0.26 μM) exhibited potent inhibitory activity against nuclear factor of activated T cells (NFAT) transcription factor, and compound1 (IC50: 28.4 ± 2.62 μM) exhibited moderate inhibitory activity.

A new monoterpene glycoside, 6’-O-β-D-glucopyranosylalbiflorin (1), and four known compounds; albiflorin (2), 6’-O-benzoylalbiflorin (3), paeoniflorin (4) and benzoyl paeoniflorin (5), were isolated from the methanolic extract of the roots ofPaeonia lactiflora Pall.. Their chemical structures were completely elucidated using a combination of 2D NMR techniques (COSY, HMQC and HMBC) and HRESI-MS analyses. To investigate the bioactivities of these compounds, their effects on the differentiation of osteoblastic MC3T3-E1 cells were tested. Compound 1 (0.01-10 μM) significantly increased the alkaline phosphatase activity and nodules mineralization of MC3T3-E1 cells compared to those of the control (Pin vitro and may contribute to the prevention for osteoporosis.

Two new triterpene glycosides, namely holothurin A3 (1) and A4 (2) were isolated from the methanol extract of the sea cucumber,Holothuria scabra, with their structures elucidated from the spectroscopic evidence (1D NMR, 2D NMR, ESI-MS and HRESI-MS). Compounds1 and2 were found to be strongly cytotoxic to both cancer cell lines, KB and Hep-G2, with 50% inhibitory concentrations (IC50) of 0.87 and 0.32 μg/mL (for compound 1) and of 1.12 and 0.57 μg/mL (for compound2), respectively.

Six phenolic constituents, 2-methoxybenzyl benzoate (1), negletein (2), 2’,3’-dihydroxy-4’,6’-dimethoxydihydrochalcone (3), 5, 6-dihydroxy-7-methoxy-dihydroflavone (4), astilbin (5), and quercitrin (6) were isolated from the methanol extract of the dried leaves ofDesmos chinensis. Their structures were elucidated from spectral and chemical data. Of these constituents, compounds 2 (IC50: 3.89 ± 0.39 μM) and3 (IC50: 9.77 ± 0.26 μM) exhibited potent inhibitory activity against nuclear factor of activated T cells (NFAT) transcription factor, and compound1 (IC50: 28.4 ± 2.62 μM) exhibited moderate inhibitory activity.

A new monoterpene glycoside, 6’-O-β-D-glucopyranosylalbiflorin (1), and four known compounds; albiflorin (2), 6’-O-benzoylalbiflorin (3), paeoniflorin (4) and benzoyl paeoniflorin (5), were isolated from the methanolic extract of the roots ofPaeonia lactiflora Pall.. Their chemical structures were completely elucidated using a combination of 2D NMR techniques (COSY, HMQC and HMBC) and HRESI-MS analyses. To investigate the bioactivities of these compounds, their effects on the differentiation of osteoblastic MC3T3-E1 cells were tested. Compound 1 (0.01-10 μM) significantly increased the alkaline phosphatase activity and nodules mineralization of MC3T3-E1 cells compared to those of the control (Pin vitro and may contribute to the prevention for osteoporosis.