Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Momoyo Ichimaru"'
Autor:
Noriyoshi Nakatani, Momoyo Ichimaru, Masataka Moriyasu, Francis D. Juma, Yumi Nishiyama, Simon G. Mathenge, Atsushi Kato, Patrick B. Chalo Mutiso
Publikováno v:
Journal of Natural Medicines. 65:313-321
A chemical investigation of the chloroform extract of the roots of Uvaria welwitschii (Annonaceae), an African traditional medicine taken for stomach ache, led to the isolation of eight new compounds, named welwitschins A-H (1-8), together with five
Autor:
Francis D. Juma, Kinuko Iwasa, Simon G. Mathenge, Patrick B. Chalo Mutiso, Yumi Nishiyama, Atsushi Kato, Momoyo Ichimaru, Masataka Moriyasu
Publikováno v:
Journal of Natural Medicines. 64:9-15
In the present study, we attempted to elucidate the antinociceptive activity of Xylopia parviflora bark using the acetic acid-induced writhing test, hot plate test, and formalin test in mice. The MeOH extract (100 and 200 mg/kg, administered intraper
Autor:
Masataka Moriyasu, Momoyo Ichimaru, Yoshizumi Matsukawa, Yukari Igi, Kinuko Iwasa, Junko Kobayakawa, Chiaki Nagase, Fumiko Sato-Nishimori
Publikováno v:
Journal of Natural Medicines. 61:329-333
Four new isoflavones (iristectrigenin A-7-glucoside (2), 8-hydroxytectrigenin (5), 8-hydroxyiristectrigenin A (6), and 8-hydroxyirigenin (7–1) have been isolated from Belamcandae Rhizoma (the rhizome of Belamcanda chinensis), along with nine known
Autor:
Yusuke Wataya, Hye‐Sook Kim, Dong-Ung Lee, Takao Yamori, Turuo Takashi, Masataka Moriyasu, Yumi Nishiyama, Momoyo Ichimaru, Kinuko Iwasa
Publikováno v:
European Journal of Medicinal Chemistry. 34:1077-1083
Seventeen quaternary protoberberine alkaloids related to berberine 1 were tested for antimalarial activity in vitro against Plasmodium falciparum and structure-activity relationships are proposed. The activity of the protoberberine alkaloids was infl
Autor:
Yumi Nishiyama, Momoyo Ichimaru, Atsushi Kato, Joseph N. Nganga, Simon G. Mathenge, Francis D. Juma, Masataka Moriyasu
Publikováno v:
Phytochemistry. 52:1593-1596
The absolute configurations of two acyclic triterpenoids 1 and 2, previously isolated from the bark of Ekebergia capensis (Meliaceae) have been determined by the modified Mosher's method.
Autor:
Atsushi Kato, Momoyo Ichimaru, Maki Sonoda, Francis D. Juma, Simon G. Mathenge, Yumi Nishiyama, Masataka Moriyasu, Kinuko Iwasa, Patrick B. Chalo Mutiso
Publikováno v:
Journal of Natural Medicines. 61:56-58
A tropane alkaloid, anhydroecgonine methyl ester N-oxide (2), was isolated for the first time as a naturally occurring compound, with anhydroecgonine methyl ester (1) from the bark of Erythroxylum emarginatum. Compound 1 was also isolated from the tw
Publikováno v:
Planta Medica. 62:440-443
The hypoglycemic effect of the rhizomes of Polygala senega L. var. latifolia Torrey et Gray (Polygalaceae) was investigated in normal and KK-Ay mice, one of the model animals of non-insulin dependent diabetes mellitus (NIDDM). The n-butanol extract o
Autor:
Momoyo Ichimaru, Yoko Tachibana, Atsushi Kato, Joseph N. Nganga, Simon G. Mathenge, Francis D. Juma, Yumi Nishiyama, Masataka Moriyasu
Publikováno v:
Phytochemistry. 42:803-807
From the dried bark of Ekebergia capensis, two novel acyclic triterpenoids, 2,3,22,23-tetrahydroxy-2,6,10,15,19,23-hexamethyl-6,10,14,18-tetracosatetraene and 2-hydroxymethyl-2,3,22,23-tetrahydroxy-6,10,15,19,23-pentamethyl-6,10,14,18-tetracosatetrae
Autor:
Masataka Moriyasu, Yumi Nishiyama, Momoyo Ichimaru, Simon G. Mathenge, Fransis D. Juma, Atsushi Kato, Joseph N. Nganga
Publikováno v:
Journal of Natural Products. 59:1113-1116
Three new prenylated flavanones, abyssinin I (1), II (2), and III (3), have been isolated from the African medicinal plant Erythrina abyssinica, together with six known flavanones. The structural elucidation of 1−3 by spectroscopic studies is descr
Autor:
Joseph N. Nganga, Masataka Moriyasu, Francis D. Juma, Simon G. Mathenge, Yumi Nishiyama, Atsushi Kato, Momoyo Ichimaru, Ogeto Jo
Publikováno v:
Phytochemical Analysis. 6:89-95
Quaternary alkaloids of the stem of Zanthoxylum usambarense, an important medicinal plant in Kenya utilized for the treatment of pneumonia and rheumatism, were examined by a combination of ion-pair extraction and preparative ion-pair high performance