申请人:Dainippon Ink & Chemicals, Inc.
公开号:US05428059A1
公开(公告)日:1995-06-27
The present invention relates to an extremely effective anti-allergic agent with a low toxicity, which possesses as its active ingredient a benzopyran derivative described by the general formula below (in the formula, R.sup.1 and R.sup.2 are each respectively a hydrogen atom, an acyl group, an alkyl group having 1.about.12 carbon atoms, or an alkenyl group having 2.about.10 carbon atoms; and R.sup.3 is a hydroxyl group, an acyloxy group, an alkoxy group having 1.about.10 carbon atoms, or an alkenyloxy group having 2.about.10 carbon atoms). General Formula ##STR1##
本发明涉及一种具有低毒性的极其有效的抗过敏剂,其活性成分为下面通用公式描述的苯并吡喁衍生物(在公式中,R.sup.1 和 R.sup.2 分别是氢原子、酰基、具有1至12个碳原子的烷基基团,或具有2至10个碳原子的烯基基团;而 R.sup.3 是羟基、酰氧基、具有1至10个碳原子的烷氧基,或具有2至10个碳原子的烯氧基)。通用公式:##STR1##