申请人:E. R. Squibb & Sons, Inc.
公开号:US04282226A1
公开(公告)日:1981-08-04
Compounds are provided having the structure ##STR1## wherein R.sup.1 is hydrogen or lower alkyl of 1-3 carbons, R.sup.2 is carboxyl, hydroxymethyl, lower alkanoyloxymethyl, or lower alkoxycarbonyl, R.sup.3 is hydrogen, lower alkyl or benzyl, and R.sup.4 and R.sup.5 are the same or different and represent hydrogen, lower alkyl, lower alkoxy, alkanoyloxy, benzyloxy, hydroxy, halogen (Cl, Br and F), nitro, and trifluoromethyl. These compounds are useful as anti-allergics when administered parenterally or by insufflation but have poor activity when administered orally.
提供了具有以下结构的化合物##STR1##其中R.sup.1是氢或1-3个碳的低烷基,R.sup.2是羧基,羟甲基,低烷酰氧甲基或低烷氧羰基,R.sup.3是氢,低烷基或苄基,而R.sup.4和R.sup.5相同或不同,代表氢,低烷基,低烷氧基,烷酰氧基,苄氧基,羟基,卤素(Cl,Br和F),硝基和三氟甲基。这些化合物在经皮或吸入途径给药时有抗过敏作用,但口服时活性较差。