申请人:Warner-Lambert Company
公开号:US04287126A1
公开(公告)日:1981-09-01
The present invention relates to (2-oxo-2H-1-benzopyran-3-yl)aminooxoacetic acids and their derivatives 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 and their pharmaceutically acceptable salts thereof; these compounds are indicated in the management of allergic manifestations such as, for example, asthma, hay fever and the like. The present invention relates to (2-oxo-2H-1-benzopyran-3-yl)aminooxoacetic acids and their derivatives having the following structural formula: ##STR2## wherein R.sub.1 is hydrogen, halogen, hydroxy, lower alkoxy, lower alkyl or nitro. R.sub.2 is hydrogen or lower alkyl and their pharmaceutically acceptable salts thereof.
本发明涉及具有以下结构式的(2-氧代-2H-1-苯并吡喃-3-基)氨氧乙酸及其衍生物:其中R.sub.1为氢、卤素、羟基、较低的烷氧基、较低的烷基或硝基,R.sub.2为氢或较低的烷基及其药学上可接受的盐;这些化合物被用于管理过敏表现,例如哮喘、花粉症等。本发明涉及具有以下结构式的(2-氧代-2H-1-苯并吡喃-3-基)氨氧乙酸及其衍生物:其中R.sub.1为氢、卤素、羟基、较低的烷氧基、较低的烷基或硝基。R.sub.2为氢或较低的烷基及其药学上可接受的盐。