Fused ring compounds of formula (I): ##STR1## (where R.sup.1 -R.sup.4, X.sup.1 and X.sup.2 represent hydrogen or various substituents, n and m are 1-3 and 2-7 respectively, the dotted lines are double or single bonds and Y is one oxygen or two hydrogens) have magnificent anti-arrhythmic activity, diuretic activity and the ability to improve brain function.
式(I)的融合环化合物:##
STR1## (其中R.sup.1 -R.sup.4,X.sup.1和X.sup.2代表
氢或各种取代基,n和m分别为1-3和2-7,虚线为双键或单键,Y为一个
氧或两个
氢),具有出色的抗心律失常活性、利尿作用和改善大脑功能的能力。