Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Yoshikazu Kumagai"'
Autor:
Ikuhiro Imaoka, Tsutomu Sato, Haruhiko Sato, Toshio Kuroki, Yoshikazu Kumagai, Hiroharu Matsuoka, Kenshi Kamei, Ken-ichi Ozaki, Naoki Taka, Ken-ichiro Kotake, Hitoshi Yoshino, Atsuko Higashida
Publikováno v:
Bioorganicmedicinal chemistry letters. 19(13)
We successfully discovered peptidomimetic motilin antagonists (17c and 17d) through the improvement of physicochemical properties of a tetrapeptide antagonist (2). Furthermore, with oral administration and based on motilin antagonistic activity, both
Autor:
Yoshikazu Kumagai, Mitsuaki Miyamoto, Akio Fukuzawa, Yoshiaki Takaya, Atsushi Abiko, Tadashi Masamune
Publikováno v:
Chemistry Letters. 14:1259-1262
The structure of new bromoditerpenes named pinnatols A, B, C,and D, isolated from the title alga, was determined on the basis of the chemical and spectral data.
Publikováno v:
Phytochemistry. 25:1305-1307
Four steroids with moulting hormone activity were isolated from Laurencia pinnata . These steroids are related structurally to β-ecdysone.
Autor:
Kokichi Takahashi, Akira Shirata, Tadashi Masamune, Shigemitsu Nagao, Mitsuo Takasugi, Yoshikazu Kumagai
Publikováno v:
Chemistry Letters. 9:1459-1460
Two antifungal compounds, designated as broussin and broussonin C, were isolated from wounded xylem tissues of paper mulberry shoots and identified as flavan and 1,3-diphenylpropane derivatives, respectively.
Autor:
Akio Fukuzawa, Yoshikazu Kumagai, Chuji Katayama, Takeshi Matsumoto, Akio Furusaki, Tadashi Masamune
Publikováno v:
Tetrahedron Letters. 22:4085-4086
The structures of two sterols, isolated from the title alga and designated as acetylpinnasterol and pinnasterol, were determined on the basis of the X-ray crystallography. These metabolites are the first marine phytosterols with ecdysone-like structu