Xanthone derivatives of the formula (I): ##STR1## (wherein W, X, Y and Z which may be the same or different represent a hydrogen atom, a halogen atom or a lower alkyl group having 1 to 4 carbon atoms; A is hydrogen atom or together with Z forms a --CH.sub.2 -- group which binds to a phenyl carbon adjacent the phenyl carbon to which the oxygen of the group ##STR2## is attached to form a cyclic methylene chain; B is a hydroxymethyl group, a lower alkoxycarbonyl group having 1 to 4 carbon atoms, or a carboxyl group, provided that W is neither a hydrogen atom nor a 7-position methyl group when X, Y and Z are each a hydrogen atom, and A is a hydrogen atom and B is a carboxyl group or a lower alkoxycarbonyl group), as well as non-toxic salts thereof when B is a carboxyl group, and a process for preparing the same are disclosed. The compounds of formula (I) in accordance with the present invention are useful as diuretics having uricosuric activity and can be used in the treatment of edema or hypertension.
An organic light-emitting device that achieves highly efficient emission and low-voltage operation is provided. The organic light-emitting device contains a 9H-xanthen-9-one derivative.
提供了一种实现高效发射和低电压操作的有机发光器件。该有机发光器件包含9H-黄色素-9-酮衍生物。
Xanthone derivatives and process for producing the same
申请人:Chugai Seiyaku
Kabushiki Kaisha
公开号:EP0175376B1
公开(公告)日:1991-04-03
SATO, HARUHIKO;DAN, TAKASHI;ONUMA, ETSURO;TANAKA, HARUKO;KOGA, HIROSHI, CHEM. AND PHAPM. BULL., 38,(1990) N, C. 1266-1277
XANTHONE COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME
申请人:Horiuchi Takayuki
公开号:US20130214268A1
公开(公告)日:2013-08-22
An organic light-emitting device that realizes high-emission efficiency and low-driving voltage is provided. The organic light-emitting device contains a xanthone compound represented by general formula [1].