All issues
Volume 31, Issue 4
Displaying 51-57 of 57 articles from this issue
-
Takao Mori, Hideo Bando, Yoshio Kanaiwa, Koji Wada, Riho Sato, Takashi ...1983Volume 31Issue 4 Pages 1422-1423
Published: April 25, 1983
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSA trifluoromethanesulfonate of anhydromesaconitine was subjected to photochemical reaction, which contains replacement of the bridgehead hydroxyl at C (13) by hydrogen, followed by catalytic hydrogenation, yielding isodelphinine.View full abstractDownload PDF (305K) -
Hideji Itokawa, Koichi Takeya, Kazuhiko Mihara, Noboru Mori, Toshinori ...1983Volume 31Issue 4 Pages 1424-1427
Published: April 25, 1983
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSAntitumor cyclic hexapeptides named RA-VII, V, IV and III were isolated from the MeOH Extracts of Rubia cordifolia and R. akane.View full abstractDownload PDF (486K) -
Kazuaki Harata, Kenji Kawano, Kazuhiro Fukunaga, Yoshiro Ohtani1983Volume 31Issue 4 Pages 1428-1430
Published: April 25, 1983
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe crystal structure of the β-cyclodextrin-nicotinamide (1 : 1) complex hexahydrate was determined by the X-ray method. The β-cyclodextrin ring is round in shape with seven intramolecular hydrogen bonds between secondary hydroxyl groups. The nicotinamide molecule is included in the host β-cyclodextrin cavity with the pyridine moiety being located at the center of the cavity. The amido group protrudes outside from the primary hydroxyl side of β-cyclodextrin and forms hydrogen bonds with adjacent β-cyclodextrin and water molecules.View full abstractDownload PDF (369K) -
Toshihiko Okamoto, Hidenao Sanjoh, Kentaro Yamaguchi, Yoichi Iitaka, S ...1983Volume 31Issue 4 Pages 1431-1432
Published: April 25, 1983
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe structure and absolute configuration of hanamisine (I), a new C20-diterpene alkaloid isolated from Aconitum sanyoense Nakai and A. S. var. tonense Nakai, have been determined by X-ray crystallography of hanamisine methiodide.View full abstractDownload PDF (302K) -
Manabu Node, Midori Sai, Kaoru Fuji, Eiichi Fujita, Setsuo Takeda, Nor ...1983Volume 31Issue 4 Pages 1433-1436
Published: April 25, 1983
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSAntitumor activity of Rabdosia diterpenoids and the related compounds against Ehrlich ascites carcinoma has been studied. In addition to α-methylene cyclopentanone moiety, spirolactone aldehyde grouping functions as an active site in these compounds. Significant increase in activity can be attributed to synergism of two active sites in the molecule.View full abstractDownload PDF (370K) -
Yoshisuke Tsuda, Md.Ekramul Haque1983Volume 31Issue 4 Pages 1437-1439
Published: April 25, 1983
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSStannylation of cholesteryl α-L-arabinopyranoside with Bu2 SnO followed by p-coumaroylation gave the 3'-o-p-coumarate, which on heating in pyridine rearranged to the 4'-o-p-coumarate. Similarly inundoside-A was converted to its 3'-o-p-coumarate and then 4'-o-p-coumarate, which were identical with inundoside-G and inundoside-D1, respectively, thus providing their total syntheses.View full abstractDownload PDF (339K) -
Motomasa Kobayashi, Tohru Yasuzawa, Minoru Yoshihara, ByengWha Son, Yo ...1983Volume 31Issue 4 Pages 1440-1443
Published: April 25, 1983
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSBy means of the circular dichroic exciton chirality method applied to various benzoyl derivatives, the absolute stereostructures of claviridenone-a (1), -b (2), -c (3), and -d (4), which were isolated from the Okinawan soft coral Clavularia viridis, have been elucidated.View full abstractDownload PDF (427K)