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:
Apr. 29, 2003
Filed:
Mar. 29, 2002
Keizo Tanikawa, Funabashi, JP;
Kazuhiko Ohrai, Funabashi, JP;
Kazufumi Yanagihara, Funabashi, JP;
Yukihiro Shigeta, Funabashi, JP;
Toru Tsukagoshi, Funabashi, JP;
Toru Yamashita, Minamisaitama-gun, JP;
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
This invention relates to a 4-oxybenzopyran derivative of formula (I) wherein, R and R represent each independently a hydrogen atom, a C alkyl group or a phenyl group; R represents a hydroxyl group or a C alkylcarbonyloxy group; R represents a hydrogen atom, a C cycloalkyl group, a C alkyl group, a C alkylcarbonyl group, a C alkylaminocarbonyl group, a di-C alkylaminocarbonyl group, an aryl group or a heteroaryl group; n represents an integer of 0-4; X represents —C(═O)NR —, —NR —, —NHC(═O)NH— or —S(O) NH—; R5 represents a hydrogen atom or (a), (b), (c), (d), (e), (f), (g), (h), (i), (j), (k), or (l); R represents a hydrogen atom, a halogen atom, a nitro group or a cyano group; or a pharmaceutically acceptable salt thereof. And this invention also relates to an antiarrhythmic agent having the prolongation effect of the functional refractory period comprising said compound or a pharmaceutically acceptable salt thereof as an active ingredient.