Aromatic compound and preparation method therefor and use thereof

A compound represented by the following general formula (I), or a tautomer, an enantiomer, a diastereomer, a racemate or a mixture thereof, or a pharmaceutically acceptable salt thereof;

• wherein,
• A is CH2;
• N1 is 1 and N2 is 0, 1, 2, 3 or 4;
• R1 and R2 are each independently hydrogen, or C1-C6 alkyl, and the above-mentioned alkyl can be independently substituted by 1 to 2 substituents selected from the group consisting of halogen, hydroxyl, amino, cyano, C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 alkoxy, and C1-C4 haloalkoxy;
• R3 is hydrogen, C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 alkoxy, C1-C6 haloalkoxy or halogen;
• and when A is CH2 and N1 is 1, R3 is not chlorine;
• each R4 is independently hydrogen, C1-C6 alkyl, C1-C6 haloalkyl, C1-C6 alkoxy, C1-C6 haloalkoxy, halogen, or cyano, wherein the halogen is fluorine, bromine or iodine;
• and R3 and R4 are not hydrogen at the same time;
• or when R3 is fluorine, not all of the substituents at other positions of the benzene ring are hydrogen or position 5 of the benzene ring is not fluorine;
• and
• the stereo configuration of α- or β-position carbon atom is each independently R, S or (R, S).