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Antioxidant constituents in the dayflower (Commelina communis L.) and their α-glucosidase-inhibitory activity
- M. Shibano, K. Kakutani, M. Taniguchi, M. Yasuda, K. Baba
- Biology, MedicineJournal of Natural Medicines
- 15 April 2008
The results showed that glucoluteolin, orientin, isoorientin, and isoquercitrin are the predominant antioxidants in this herb and inhibited the activity of α-glucosidase from rat intestine.
Studies on the constituents of Broussonetia species. II. Six new pyrrolidine alkaloids, broussonetine A, B, E, F and broussonetinine A and B, as inhibitors of glycosidases from Broussonetia kazinoki…
- M. Shibano, S. Kitagawa, S. Nakamura, N. Akazawa, G. Kusano
- Chemistry, BiologyChemical & pharmaceutical bulletin
- 15 April 1997
Six new pyrrolidine alkaloids were isolated from the branches of Broussonetia kazinoki Sieb.
Filiasparosides A-D, cytotoxic steroidal saponins from the roots of Asparagus filicinus.
- Li-bo Zhou, Tzu-Hsuan Chen, K. Bastow, M. Shibano, K. Lee, Dao-feng Chen
- Chemistry, MedicineJournal of natural products
- 13 July 2007
Four new steroidal saponins, filiasparosides A-D (1-4), together with known aspafiliosides A (5) and B (6) were isolated from the roots of Asparagus filicinus. The structures of these new compounds…
Phylogenetic relationship of six Glycyrrhiza species based on rbcL sequences and chemical constituents.
The nucleotide sequences of ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit gene (rbcL) of Glycyrrhiza glabra, G. uralensis and G. inflata have been determined to construct their phylogenetic tree and it is shown that these two species are closely related.
Five new nortropane alkaloids and six new amino acids from the fruit of Morus alba LINNE growing in Turkey.
Investigation of the constituents of the fruits of Morus alba LINNE (Moraceae) afforded five new nortropane alkaloids (1-5) along with nor-psi-tropine (6) and six new amino acids, morusimic acids A-F…
Studies on the Constituents of Broussonetia Species. I. Two New Pyrrolidine Alkaloids, Broussonetines C and D, as β-Galactosidase and β-Mannosidase Inhibitors from Broussonetia kazinoki SIEB.
Two new pyrrolidine alkaloids called broussonetines C and D were isolated from the branch of B Roussonetia kazinoki SIEB by spectroscopic and chemical methods and showed an inhibition to β-galactosidases and β-mannosidase.
Antitumor agents. 261. 20(S)-protopanaxadiol and 20(s)-protopanaxatriol as antiangiogenic agents and total assignment of (1)H NMR spectra.
This report is the first to completely assign the (1)H NMR signals of 2, together with correction of data for 1 from prior reports, and report the complete and unambiguous assignment of 1 and 2, based on analyses of 2D NMR spectra.
Twelve New Cyclolanostanol Glycosides from the Underground Parts of Cimicifuga simplex WORMSK
Two new pyrrolidine alkaloids, radicamines A and B, as inhibitors of alpha-glucosidase from Lobelia chinensis Lour.
- M. Shibano, D. Tsukamoto, A. Masuda, Y. Tanaka, G. Kusano
- ChemistryChemical & pharmaceutical bulletin
- 1 October 2001
Two new pyrrolidine alkaloids, radicamines A and B were isolated as inhibitors of alpha-glucosidase from Lobelia chinensis Lour. (Campanulaceae). Radicamines A and B were formulated as…
Separation and characterization of active flavonolignans of Silybum marianum by liquid chromatography connected with hybrid ion-trap and time-of-flight mass spectrometry (LC-MS/IT-TOF).
The results with the present methodology show that liquid chromatography-mass spectrometry IT-TOF (LC-MS/IT-TOf) can be useful for general screening of active natural products from plant extracts and for the specific quality control of silymarin.