It relates to a quinazoline compound useful as a medicine exhibiting an inhibitory action on calmodulin-dependent cGMP-PDE. A quinazoline compound represented by the general formula (I) or a pharmacologically acceptable salt thereof: ##STR1## (wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 may be the same or different from each other and each represents a hydrogen atom, a lower alkyl group or the like; and R.sup.6 and R.sup.7 may be the same or different from each other and each represents a hydrogen atom, a carboxyl alkyl group or the like).
A quinazoline compound represented by general formula (I), which is useful as a medicine having the activity as a calmodulin-dependent cGMP-PDE inhibitor, or a pharmacologically acceptable salt thereof wherein R1, R2, R3, R4 and R5 represent each independently hydrogen, lower alkyl, etc.; and R6 ad R7 represent each independently hydrogen, carboxyalkyl, etc.