RECEPTOR ANTAGONIST

摘要

[In the formula, p is an integer of 1 to 3; R1 represents a heterocyclic group, etc.; R2 represents -N(-R4)(-R5) (wherein R4 and R5 are the same or different and each represents hydrogen, aralkyl, etc. or R4 and R5 in cooperation with the adjacent nitrogen atom form a heterocyclic group), etc.; and Q represents -N=C(-R7)- (wherein R7 represents substituted amino, etc.), etc.] An adrenergic .alpha.2C receptor antagonist which contains as an active ingredient a fused-ring pyrimidine derivative represented by the general formula (I) or a pharmacologically acceptable salt of the derivative is provided. The antagonist is useful in treatments for and/or prevention of various diseases attributable to the hyperenergia of an adrenergic .alpha.2C receptor.