| abstract |
The present invention relates to a compound of formula (I)n nwherein Y and Z each is independently N or C; ring A is a carbocyclic group or a heterocyclic group; ring B is a heterocyclic group containing at least one nitrogen atom; R is a hydrogen atom, a substituent, etc, ; n is 0, or an integer of from 1 to 10, a salt thereof, a solvate thereof, or an N-oxide thereof, or a prodrug thereof. The compound of formula (I), a salt thereof, a solvate thereof, or an N-oxide thereof, or a prodrug thereof has an inhibitory activity against cysteine protease, and it is useful for the prophylaxis and/or treatment of a cysteine protease-related disease such as osteoporosis, etc. |