Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Ken-ichi Nakaya"'
Autor:
Zulfiqar Ali, Tetsuro Ito, Toshiyuki Tanaka, Dedy Darnaedi, Miyuki Furusawa, Ibrahim Iliya, Ken-ichi Nakaya, Masayoshi Oyama, Jin Murata, Munekazu Iinuma
Publikováno v:
Chemistry & Biodiversity. 2:1673-1684
Five new resveratrol (=5-[(E)-2-(4-hydroxyphenyl)ethenyl]benzene-1,3-diol) tetramers, upunaphenols H-J (1-3) and trans-(4) and cis-upunaphenol K (5), were isolated from the stem of Upuna borneensis (Dipterocarpaceae). Their structures were elucidated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::499cd32dd8abb67da27bf93520355852
https://doi.org/10.1002/cbdv.200590137
https://doi.org/10.1002/cbdv.200590137
Autor:
Tetsuro Ito, Miyuki Furusawa, Munekazu Iinuma, Yoshikazu Takahashi, Toshiyuki Tanaka, Ibrahim Iliya, Soedarsono Riswan, Yumiko Kubota, Ken-ichi Nakaya, Ryuichi Sawa
Publikováno v:
Tetrahedron Letters. 46:3111-3114
A new resveratrol tetramer, shoreaketone, was isolated from the stem bark of Shorea uliginosa (Dipterocarpaceae). The structure and the relative configuration were confirmed on the basis of 1D- and 2D-NMR spectral data. The structure has a novel fram
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::578b954df498311fc8a141269f5e239e
https://doi.org/10.1016/j.tetlet.2005.02.165
https://doi.org/10.1016/j.tetlet.2005.02.165
Publikováno v:
Bulletin of the Chemical Society of Japan. 78:464-467
A chiral pyrromethene–BF2 complex dye, showing absorption (λmax) and emission maxima (λem) at 499 and 518 nm in acetonitrile, respectively, was synthesized. Racemic mexiletine smoothly reacted with...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1da1fc184c6f827b3fad6437a8952eae
https://doi.org/10.1246/bcsj.78.464
https://doi.org/10.1246/bcsj.78.464
Autor:
Tetsuro Ito, Dedy Darnaedi, Jin Murata, Ken-ichi Nakaya, Zulfiqar Ali, Toshiyuki Tanaka, Miyuki Furusawa, Ibrahim Iliya, Munekazu Iinuma
Publikováno v:
CHEMICAL & PHARMACEUTICAL BULLETIN. 53:219-224
Four new resveratrol derivatives, upunaphenols B (1), C (4), D (5) (resveratrol tetramer) and E (6, resveratrol dimer with a C6-C1 unit), together with nine known resveratrol oligomers and resveratrol were isolated from an acetone soluble part of ste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28eb2c8d9b6a0626c714b85e81e1bc2c
https://doi.org/10.1248/cpb.53.219
https://doi.org/10.1248/cpb.53.219
Autor:
Tetsuro Ito, Dedy Darnaedi, Jin Murata, Munekazu Iinuma, Ken-ichi Nakaya, Ryuichi Sawa, Y. Takahashi, Toshiyuki Tanaka
Publikováno v:
Journal of Natural Products. 67:932-937
Three new stilbene oligomers (1-3) were isolated from the stem bark of Vatica pauciflora. The structures of a resveratrol heptamer (pauciflorol D) (1), a resveratrol dimer (pauciflorol E) (2), and an indanone derivative (pauciflorol F) (3) were eluci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aee49fd7e5cbcb329147a3b0b516c167
https://doi.org/10.1021/np030236r
https://doi.org/10.1021/np030236r
Autor:
Ryuichi Sawa, Jin Murata, Ken-ichi Nakaya, Munekazu Iinuma, Yoshikazu Takahashi, Toshiyuki Tanaka, Tetsuro Ito, Dedy Darnaedi
Publikováno v:
Helvetica Chimica Acta. 87:479-495
Two new stilbene tetramers, grandiphenols A (1) and B (2), along with ten known stilbene oligomers and bergenin were isolated from the stem of Dipterocarpus grandiflorus. The structures of 1 and 2 composed of four resveratrol (=5-[(1E)-2-(4-hydroxyph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42dd1fcea0ac28c8c9f04f5b63462318
https://doi.org/10.1002/hlca.200490046
https://doi.org/10.1002/hlca.200490046
Autor:
Hikaru Nakamura, Munekazu Iinuma, Toshiyuki Tanaka, Soedarsono Riswan, Ken-ichi Nakaya, Tetsuro Ito, Hiroshi Naganawa, Yoshikazu Takahasi
Publikováno v:
Helvetica Chimica Acta. 86:3394-3401
From the stem bark of Shorea hemsleyana, a new dimeric stilbenoid with a five-membered lactone ring, shorealactone (1) was isolated. The absolute configuration was determined by means of 2D NMR techniques and X-ray crystal-structure analysis of its 4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70e0e5e2e2c667300d725483379e7958
https://doi.org/10.1002/hlca.200390283
https://doi.org/10.1002/hlca.200390283
Publikováno v:
Bulletin of the Chemical Society of Japan. 76:1405-1408
A lactam-type enantiomeric fluorescent labeling reagent was prepared from Rhodamine B. This reagent showed its absorption and emission maxima at λ 557 and 580 nm in an acetonitrile–acetic acid (9:1) mixed solution, respectively. Racemic Flurbiprof
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0c1841077225acb6610bab8fe5f7c74
https://doi.org/10.1246/bcsj.76.1405
https://doi.org/10.1246/bcsj.76.1405
Autor:
Jin Murata, Tetsuro Ito, Dedy Darnaedi, Yoshiaki Shirataki, Toshiyuki Tanaka, Ibrahim Iliya, Munekazu Iinuma, Yoshikazu Takahashi, Ken-ichi Nakaya, Ryuichi Sawa, Zulfiqar Ali
Publikováno v:
Tetrahedron. 59:5347-5363
Five new resveratrol oligomers; pauciflorols A–C ( 1–3 ), isovaticanols B ( 6 ) and C ( 8 ), and three new oligostilbene glucosides; pauciflorosides A ( 11 ), B ( 13 ), C ( 14 ), were isolated from the stem bark of Vatica pauciflora (Dipterocarpa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75c6ffd247bbc8a330617c2cdc78dca9
https://doi.org/10.1016/s0040-4020(03)00730-0
https://doi.org/10.1016/s0040-4020(03)00730-0
Autor:
Toshiyuki Tanaka, Ryuichi Sawa, Hiroshi Naganawa, Munekazu Iinuma, Tetsuro Ito, Ken-ichi Nakaya, Veliah Chelladurai, Yoshikazu Takahashi
Publikováno v:
Tetrahedron. 59:1255-1264
Two new stilbenoids, vateriaphenols A ( 1 ) and B ( 2 ), were isolated from the stem bark of Vateria indica along with known 10 stilbenoids ( 3–12 ) and bergenin ( 13 ). The structures of isolates were established based on spectroscopic analysis. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81055d482d13f3f1371433d0c66b7993
https://doi.org/10.1016/s0040-4020(03)00024-3
https://doi.org/10.1016/s0040-4020(03)00024-3