Patent ID: 7279484

Claim:
A heterocyclic compound represented by the formula (I) or a tautomer thereof, or a pharmaceutically acceptable salt thereof, wherein R is any of: an alkyl group optionally having substituent(s), a cycloalkyl group optionally having substituent(s), a cycloalkylalkyl group optionally having substituent(s), an aryl group optionally having substituent(s), an aralkyl group optionally having substituent(s), a heteroaryl group optionally having substituent(s), a heteroarylalkyl group optionally having substituent(s), a heterocyclic group optionally having substituent(s), a heterocyclic-alkyl group optionally having substituent(s), A-B- wherein A is: an alkyl group optionally having substituent(s), a cycloalkyl group optionally having substituent(s), an aryl group optionally having substituent(s), a heteroaryl group optionally having substituent(s) or a heterocyclic group optionally having substituent(s), and B is an oxygen atom or a sulfur atom, and wherein R 1 and R 2 are the same or different and each is: a hydrogen atom, an alkyl group optionally having substituent(s), a cycloalkyl group optionally having substituent(s), an aryl group optionally having substituent(s), a heteroaryl group optionally having substituent(s) or a heterocyclic group optionally having substituent(s), X is an amino group optionally having substituent(s); and Y 1 and Y 2 is each a nitrogen atom or a —CH— moiety provided that Y 1 and Y 2 are not carbon atoms at the same time.