Coumarin derivatives of the general formula: ##STR1## wherein R is hydrogen atom, an alkyl group or an alkenyl group, R.sup.1 is hydrogen atom, an alkyl group, an alkenyl group or an alkoxy group, and the OR and R.sup.1 groups each are substituted at any of the 5, 6, 7 and 8 positions of the coumarin ring, and the salt thereof. The compounds are useful as antiallergic agent for preventing and treating allergic diseases.
通用公式的
香豆素衍
生物:其中R是氢原子、烷基或烯基,R.sup.1是氢原子、烷基、烯基或烷氧基,OR和R.sup.1基团分别在
香豆素环的5、6、7和8位置的任一处被取代,以及其盐。这些化合物可用作预防和治疗过敏疾病的抗过敏剂。