Abstract: The present disclosure relates to pyrimidine compounds, and more specifically, relates to pyrimidine compounds, preparation methods thereof, and uses thereof in manufacture of medicaments. Provided is a compound represented by Formula (I) or a tautomer, stereoisomer, hydrate, solvate, pharmaceutical acceptable salt, or prodrug of the compound represented by Formula (I). The compound has a significant inhibitory effect on ATX enzyme, exhibits excellent liver metabolism stability, is metabolized more slowly in the human body, and has higher exposure.

Abstract: Provided is a compound. The compound is a compound represented by formula (A), or a tautomer, a stereoisomer, a hydrate, a solvate, a salt, or a prodrug of the compound represented by formula (A), where R is R1 and R2 are each independently selected from H, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxyl, halogen, and —CN; and R3, R4, and R5 are each independently selected from C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxyl, halogen, and —CN, under a premise that: if R1 is —CH3, C1, or —CN, R2 is not H, and if R1 is H, R2 is not H, —CN, or —CH3.