申请人:Warner-Lambert Company
公开号:US04198511A1
公开(公告)日:1980-04-15
The present invention relates to 1,5-dihydro-1,5-dioxo-N-1H-tetrazol-5-yl-4H-[1]benzopyrano[3,4-b]pyridine- 3-carboxamides having the following structural formula: ##STR1## wherein R.sub.1 is hydrogen, halogen, hydroxy, lower alkoxy, lower alkyl or nitro and R.sub.2 is hydrogen or lower alkyl. These compounds and their pharmaceutically acceptable salts are useful in the management of allergic manifestations such as bronchial asthma, hay fever and the like.
本发明涉及具有以下结构式的1,5-二氢-1,5-二氧-N-1H-四唑-5-基-4H-[1]苯并吡啶[3,4-b]吡啶-3-羧酰胺:##STR1##其中R.sub.1是氢、卤素、羟基、较低的烷氧基、较低的烷基或硝基,R.sub.2是氢或较低的烷基。这些化合物及其药学上可接受的盐在过敏反应的治疗中,例如支气管哮喘、花粉热等方面是有用的。