NITROGENOUS FUSED HETEROAROMATIC RING DERIVATIVE

摘要

A compound represented by the formula (I): [wherein A1 represents hydrogen, etc.; j and k each is 0 or 1; ... (P)j = represents a double bond, etc.; ... (Q)k = represents a double bond, etc.; and one of W1 and W2 represents E-O-W, etc. and the other represents hydrogen, etc., provided that E represents a divalent group formed by removing two hydrogen atoms from a benzene ring, etc. and W represents a group represented by the formula (II-1)] or a pharmaceutically acceptable salt of the compound. The compound and salt have antagonistic activity against a histamine H3 receptor or inverse agonistic activity against a histamine H3 receptor and are useful in the prevention or treatment of metabolic diseases, circulatory diseases, or nervous diseases.