The present invention aims to provide a compound having superior pharmacological action, physicochemical properties and the like and useful as an sGC activation drug, or an agent for the prophylaxis and/or treatment of diseases such as hypertension, ischemic cardiac disease, cardiac failure, kidney disease, arteriosclerotic disease, atrial fibrillation, pulmonary hypertension, diabetes, diabetic complications, metabolic syndrome, peripheral arterial obstruction, erectile dysfunction and the like.An sGC activation drug containing a compound represented by the formula (II): wherein each symbol is as defined in the specification, or a salt thereof, as an active ingredient.