The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1998
Filed:
Mar. 15, 1996
Yoshikazu Iwasawa, Tsukuba, JP;
Tetsuya Aoyama, Tsukuba, JP;
Kumiko Kawakami, Tsukuba, JP;
Sachie Arai, Tsukuba, JP;
Toshihiko Satoh, Tsukuba, JP;
Yoshiaki Monden, Tsukuba, JP;
Banyu Pharmaceutical Co., Ltd., Tokyo, JP;
Abstract
The present invention relates to a compound of the formula (I): ##STR1## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 represent an aryl group or a heteroaromatic ring group; A represents a hydrocarbon group which may be substituted; X and Y represent an oxygen atom, a sulfur atom, a carbonyl group or a group of the formula --CHR.sup.a -- (wherein R.sup.a is a hydrogen atom or a lower alkyl group) or --NR.sup.b -- (wherein R.sup.b is a hydrogen atom or a lower alkyl group), or X and Y together represent a vinylene group or an ethynylene group; R.sup.1, R.sup.2, R.sup.3, R.sup.8 and R.sup.9 represent a hydrogen atom, a halogen atom, a hydroxyl group, a lower alkyl group or a lower alkoxy group; R.sup.4 and R.sup.5 represent a hydrogen atom, a halogen atom, a hydroxyl group, an amino group, a nitro group, a cyano group, a carboxyl group, a lower alkoxycarbonyl group, a carbamoyl group, a lower alkylcarbamoyl group, a lower alkyl group, a lower hydroxyalkyl group, a lower fluoroalkyl group or a lower alkoxy group; R.sup.6 is a lower alkyl group; and R.sup.7 is a hydrogen atom or a lower alkyl group, provided that when one of X and Y is an oxygen atom, a sulfur atom or a group of the formula --NR.sup.b --, the other is a carbonyl group or a group of the formula --CHR.sup.a --, its pharmaceutically acceptable salt or ester, and an antitumor agent containing it as an active ingredient.