Patent ID: 8101649

Claim:
An N-acylhydrazone derivative represented by Formula I a stereoisomer thereof or a mixture of its stereoisomers, or a pharmaceutically acceptable salt thereof, wherein R 1 represents hydrogen; and A represents a cycloalkyl group; or a thienyl group; or A together with R 2 , together with the carbon atom to which they are attached, form a naphthalene or hydrogenated naphthalene ring, which naphthalene and hydrogenated naphthalene are optionally substituted one or more times with substituents selected from alkyl and oxo; and R 2 represents hydrogen or alkyl; or R 2 together with A, and together with the carbon atom to which they are attached, form a naphthalene or hydrogenated naphthalene ring, which naphthalene and hydrogenated naphthalene are optionally substituted one or more times with substituents selected from alkyl and oxo.