A compound represented by the following formula I, a stereoisomer thereof or a pharmaceutically acceptable salt thereof: ** Formula ** wherein R1 is hydrogen or -CH3, R2 is hydrogen or -CH3, with the proviso that R2 is -CH3 when R1 is hydrogen, and R2 is hydrogen when R1 is -CH3 L is - (C4-C5 alkyl) -； - (C1-C3 alkyl) -L1-； -C (>； = O) -L1- or -S (>； = O) 2-L1-, where - (C4-C5 alkyl) - and - (C1-C3 alkyl) - can be unsubstituted or substituted with - CH3, L1 is -cycloalkyl (C3-C6) -； ** Formula ** A1 and A2 are each independently -N- or -CR3-, provided that both A1 and A2 cannot be - N-, R3 it is hydrogen； -F, -Cl, -Br, -I or -OH, and A3 is -NH- or -O-, Q is selected from the group consisting of -alkyl (C1-C6) -； -alkenyl (C2-C6) -； -C (>； = O) -； -C (>； = S) -； -S (>； = O) 2- or ** Formula ** where -alkyl (C1-C6) - and -alkenyl (C2-C6) - can be unsubstituted or substituted each with 1 to 3 groups -CH3 or halogen atoms, Q1 is hydrogen； -F, -Cl, -Br or -I, n is an integer of 0, 1 or 2, provided that n is 0 when Q is ** Formula ** n is 1 when Q is -C (>； = O) -； -C (>； = S) - or -S (>； = O) 2-, and n is 1 or 2 when Q is -alkyl (C1-C6) - or -alkenyl (C2-C6) -, and X can be selected from group consisting of -C1-C6 alkyl； -C3-C6 cycloalkyl； -C2-C6 alkenyl； - C3-C6 cycloalkenyl； - (C0-C2 alkyl) Ar； -OAr； - (C0-C2 alkyl) Het； naphthyl and the following groups: ** Formula ** in which R4 is H or -C1-C4 alkyl, -C0-C2 alkyl, -C2-C6 alkenyl and -C1-C6 alkyl may be unsubstituted or substituted with 1 to 2 -CH3 groups； 1 to 3 -F groups, or a combination thereof, Ar is a monocyclic aromatic C6 compound, which may be unsubstituted or substituted with one or more halogen atoms； -OH； -NH2； -C1-C6 alkyl； -C1-C6 alkyl； -C3-C6 cycloalkenyl； -NH (C1-C6 alkyl)； -N (C1-C3 alkyl) 2； -CH2N (C1-C3 alkyl) 2； -S (>； = O) 2- (C1-C3 alkyl) or phenyl groups, wherein -C1-C3 alkyl； -C1-C6 alkyl and - C3-C6 cycloalkenyl can each be independently substituted with 1 to 5 -F or -CH3 gro
