The present invention relates to a compound of the formula (I): ##STR00001## wherein Az is a group comprising a monocyclic azole or a bicyclic aromatic ring of the same or different fused azoles; T, U, V and W are independently methine or nitrogen, wherein a methine may be optionally substituted by a substituent, and at least two of T, U, V and W are methine groups; and X is nitrogen or methine.The compounds of the present invention are useful as agents for the treatment of various kinds of diseases related to NPY, for example, cardiovascular disorders, nervous system disorders, genitative diseases, metabolic diseases, genital or reproductive disorders, gastro-intestinal disorders, respiratory disorders, inflammatory diseases or glaucoma, and the like.