Novel adamantane derivative compound

A compound represented by the following Chemical Formula 1, an isomer thereof, pharmaceutically acceptable salt thereof, prodrug thereof, hydrate thereof or a solvate thereof:

• wherein X is —NHCO— or —CONH—,
• each of R1 and R2 is independently substituted, R1 is selected from the group consisting of hydrogen, halogen, NO2, C1-C6 alkoxy, CN, CO2Me, CO2H and NH2,
• R2 is selected from the group consisting of hydrogen, C1-C6 alkoxy, C1-C6 alkyl and halogen,
• or
• R1 and R2 are linked to each other to form a cyclic carbon chain optionally containing a hetero atom, wherein the cyclic carbon chain is selected from the group consisting of C2-C18 cycloalkyl;
• C4-C18 aryl;
• C2-C18 heterocycloalkyl in which at least one carbon is substituted with at least one hetero atom selected from nitrogen, oxygen and sulfur;
• and C4-C18 heteroaryl in which at least one carbon is substituted with at least one hetero atom selected from nitrogen, oxygen and sulfur;
• R3 is selected from the group consisting of hydrogen, C1-C6 alkoxy and halogen.