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:
Jul. 07, 1998
Filed:
Jun. 14, 1995
Kazuhito Furukawa, Katoh-gun, JP;
Taisuke Hasegawa, Katoh-gun, JP;
Nippon Zoki Pharmaceutical Co., Ltd., Osaka, JP;
Abstract
A rapid-acting remedy for asthma having a bronchodilating action contains at least one pyrido�2,3-d!pyrimidine derivative represented by the general formula (A) or pharmaceutically acceptable salts or metal complexes thereof as an effective component: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and each of R.sup.1 and R.sup.2 is hydrogen, alkyl or benzyl; R.sup.3 is hydrogen, hydroxyl, dialkylaminomethyleneamino or --NH--X; X is hydrogen, alkyl, alkenyl, hydroxyl, amino, hydroxyalkyl, benzyl or acyl; R.sup.4 is hydrogen, alkyl, halogen, nitro, amino, hydroxyl, benzyloxy, cyano, carboxyl, alkoxycarbonyl, alkoxysulfonyl, aminosulfonyl, dialkylaminosulfonyl or sulfo; and R.sup.5 is hydrogen, alkyl or amino. The rapid-acting remedy for bronchial asthma is capable of relieving the symptom of laboring breath at the onset of asthma due to its excellent bronchodilating action. It can be used as a therapy not only for allergic asthma but also for various bronchial asthmas such as endogenous asthma, exogenous asthma and dust asthma.