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Ultrasensitive fluorometric detection of carbohydrates as derivatives in mixtures separated by capillary electrophoresis.
- J. Liu, O. Shirota, D. Wiesler, M. Novotny
- Chemistry, Medicine
- Proceedings of the National Academy of Sciences…
- 15 March 1991
Reducing monosaccharides and oligosaccharides, after reductive amination, were separated and detected as their 3-(4-carboxybenzoyl)-2-quinolinecarboxaldehyde (CBQCA) derivatives by capillary… Expand
Cytotoxic aromatic triterpenes from Maytenus ilicifolia and Maytenus chuchuhuasca.
- O. Shirota, H. Morita, K. Takeya, H. Itokawa
- Biology, Medicine
- Journal of natural products
- 1 December 1994
The isolation and structure elucidation of four cytotoxic aromatic triterpenes [1-4] along with three known quinoid triterpenes [5-7] from the South American medicinal plants Maytenus ilicifolia and… Expand
Sensitive, laser-assisted determination of complex oligosaccharide mixtures separated by capillary gel electrophoresis at high resolution.
Antiandrogenic phenolic constituents from Dalbergia cochinchinensis.
Four new compounds, 9-hydroxy-6,7-dimethoxydalbergiquinol, 6-hydroxy-2,7-dimethoxyneoflavene, 6,4'-dihydroxy-7-methoxyflavan and 2,2',5-trihydroxy-4-methoxybenzophenone, in addition to eight known… Expand
Triterpenoid saponin from Vaccaria segetalis.
A new triterpenoid saponin, vaccaroid B, has been isolated from the seeds of Vaccaria segetalis and its structure was elucidated to be 3beta-hydroxyolean-12-en-23, 28-dioic… Expand
One step formation of capsaisin α-glucoside by enzymatic transglucosylation and its molecular properties
- Hiromichi Tsukiura, R. Yamamoto, Yuta Morishita, O. Shirota, M. Kuroyanagi, N. Muto
- 26 August 2015
Capillary electrophoresis of amino sugars with laser-induced fluorescence detection.
3-(4-Carboxybenzoyl)-2-quinolinecarboxaldehyde has been utilized as a precolumn derivatization agent for various amino sugars. Constituents of various biological mixtures can be converted to highly… Expand
Separation of fluorescent oligosaccharide derivatives by microcolumn techniques based on electrophoresis and liquid chromatography.
Various aldose oligosaccharides can be quantitatively derivatized into primary amines for subsequent reaction with fluorogenic reagents, such as 3-(4-carboxybenzoyl)-2-quinolinecarboxaldehyde or… Expand
Low concentration drug analysis by semi-microcolumn liquid chromatography with a polymer-coated mixed-function precolumn
The construction and performance of dual-and triple-column systems for the analysis of dilute drug samples are described. The systems are based on the following two separation processes: (1)… Expand
Characterization of Polymer-Coated C18 Packing Materials for Reversed-Phase Liquid Chromatography
Two kinds of polymer-coated, silica-based C 18 packing materials differing from each other in synthetic procedure are prepared. One is obtained by forming a silicone polymer on a silica surface and… Expand