As a pharmaceutical product useful for patients with urine evacuation disorders for whom conventional drugs are ineffective, a drug is disclosed having inhibitory activity on ENPP2, which is a target different from that of already existing drugs. Disclosed are a compound represented by formula (I) (wherein definitions of the groups are as in the description) having ENPP2 inhibitory activity, a salt or solvate thereof, a prodrug of either of these, or an agent for prevention, treatment and/or symptomatic improvement of urine evacuation disorders containing either of these as an active ingredient.
