Patent ID: 7183415

Claim:
A compound represented by the formula: wherein Ar is a cyclic group optionally having substituent(s); X is a bond or a spacer having a main chain of 1 to 6 atoms; R 1 and R 2 are the same or different and each is a hydrogen atom or a hydrocarbon group optionally having substituent(s), or R 1 and R 2 may form, together with the adjacent nitrogen atom, a nitrogen-containing heterocycle optionally having substituent(s); Y is a C 1 –C 6 alkylene; R 3 is a hydrogen atom or a hydrocarbon group optionally having substituent(s); and ring A and ring B may further have substituent(s), and when ring B further has a substituent, the substituent may be linked to R 1 to form a ring, or a salt thereof or a prodrug thereof.