Patent ID: 7271260

Claim:
A 3,4-dihydroquinazoline derivative of Formula 1 or a salt thereof: wherein, n is an integer ranging from 1 to 4; R 1 is hydrogen; R 2 is C 1 -C 6 alkyl; phenyl; 4-morpholinyl; piperazinyl having a C 1 -C 4 alkyl substituent at the 4 th position; 1-pyrrolidinyl; 1-piperidinyl; or —NR 6 R 7 , wherein R 6 and R 7 are each independently C 1 -C 6 alkyl; R 3 is C 1 -C 6 alkyl or phenyl; wherein X is O or NH; m is an integer ranging from 1 to 4; and R 5 is methyl or F.