It is intended to provide compounds having EDG-5 antagonism. Because of having EDG-5 antagonism, compounds of the formula (I): ##STR00001## wherein each symbol is as defined in the description; salts thereof, N-oxides thereof, solvates thereof or prodrugs thereof are useful as preventive and/or therapeutic agent for EDG-5 mediated diseases, for example, diseases caused by blood vessel contraction (e.g. cerebrovascular spasms disease, cardiovascular spasms diseases, coronary artery spasms disease, hypertension, pulmonary hypertension, renal diseases, myocardial infarction, angina pectoris, arrhythmia, portal hypertension, varicosity and the like), arteriosclerosis, pulmonary fibrosis, hepatic fibrosis, renal fibrosis, respiratory diseases (e.g. bronchial asthma, chronic obstructive pulmonary diseases and the like), nephropathy, diabetes, hyperlipemia and the like.