摘要 |
A compound having an inhibitory activity against cysteine protease, represented by formula (I): (wherein ring X is a heterocyclic group which may contain 1 to 4 hetero atoms selected from an nitrogen atom(s), a oxygen atom(s) and a sulfur atom(s) which may be oxidized, in addition to said nitrogen atom in the ring; J is a bond or a spacer having from 1 to 8 atoms; R, R<SUP>1</SUP>, R<SUP>2 </SUP>and R<SUP>3 </SUP>is each independently hydrogen atom or a substituent; n is 0 or an integer of 1 to 10), a salt thereof, a solvate thereof, or an N-oxide thereof, or a prodrug thereof; and an agent for prevention and/or treatment for a cysteine protease-related disease, such as osteoporosis, comprising it as an active ingredient are provided.
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