Patent ID: 8524727

Claim:
A compound of formula (I), or a salt thereof: wherein R 1 is lower alkyl, C 3-6 cycloalkyl, or halogeno-lower alkyl; R 2 is —C(O)R 20 ; W is —NH—; R 3 is C 7-10 cycloalkyl which optionally has 1 to 5 substituents selected from the group consisting of lower alkyl, halogen, and —OH, on the ring; each R 0 is the same as or different from each other, each representing H or lower alkyl; R 20 is a nitrogen-containing saturated hetero ring group which optionally has 1 to 5 substituents selected from Group G 2 ; Group G 2 is lower alkyl, halogen, halogeno-lower alkyl, —C(O)OR 0 , —C(O)N(R 0 ) 2 , —CN, —X—OR 0 , —O-lower alkylene-OR 0 , —O-halogeno-lower alkyl, —OC(O)-lower alkyl, —X—N(R 0 ) 2 , oxo, —X—C 3-6 cycloalkyl, —X—O—X—C 3-6 cycloalkyl, —X-phenyl, or —X-morpholinyl; each X is the same as or different from each other, each representing a bond or lower alkylene.