| abstract |
A 2-iminoimidazole derivative represented by the formula: n n{wherein R 1 , R 2 and R 3 represent hydrogen, optionally substituted C 1-6 alkyl, etc.; R 6 represents hydrogen, C 1-6 alkyl, C 1-6 alkyloxycarbonyl, etc.; Y 1 represents a single bond, —CH 2 —, etc.; Y 2 represents a single bond, —CO—, etc.; and Ar represents hydrogen, a group represented by the formula:n n n[wherein R 10 –R 14 represent hydrogen, C 1-6 alkyl, hydroxyl, C 1-6 alkoxy, etc., and R 11 and R 12 or R 12 and R 13 may bond together to form a 5- to 8-membered heterocycle], etc.}or salt thereof. |