Diphenylaminopyrimidine and triazine compound, and pharmaceutical composition and use thereof

A diphenylaminopyrimidine and triazine compound of Formula I, or a pharmaceutically acceptable salt, stereoisomer, hydrate or solvate thereof:

• wherein:
• A is C;
• X and Y are independently selected from the group consisting of hydrogen, halo, cyano, trifluoromethyl, alkoxy, alkyl, aryl, alkenyl, alkynyl, and nitro;
• or
• X and Y, together with the atoms to which they are attached, form a phenyl ring or an heteroaromatic ring, the heteroaromatic ring containing one or more of oxygen, sulfur and nitrogen heteroatoms;
• R1 is
• R2 is CD3 or CD2CD3;
• R3 is selected from
• R4 is selected from the group consisting of hydrogen, methyl, trifluoromethyl, cyano and halo;
• R5 is selected from the group consisting of hydrogen, alkyl, substituted and unsubstituted phenyl, allyl and propargyl;
• and
• R6 and R7 are independently selected from the group consisting of hydrogen, alkyl, substituted and unsubstituted phenyl, allyl and propargyl;
• or
• R6 and R7, together with the N atom to which they are attached, form a substituted or unsubstituted heterocycloalkyl group, the heterocycloalkyl group containing one or more of oxygen, sulfur, nitrogen, sulfoxide and sulfone groups.