Novel pyrimidine derivatives of the formula (I): ##STR1## wherein R1 is a C.sub.1 -C.sub.6 haloalkyl group, a C.sub.1 -C.sub.6 alkyl group, a C.sub.3 -C.sub.6 cycloalkyl group or the like, R2 is a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group, a C.sub.3 -C.sub.6 cycloalkyl group or the like, and X is a carbonyl group or --C(R3)OH (wherein R3 is a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group or the like).
化合物的
化学式为(I),其中R1为C1-C6卤代烷基、C1-C6烷基、C3-C6环烷基或类似基团,R2为氢原子、C1-C6烷基、C3-C6环烷基或类似基团,X为羰基或--C(R3)OH(其中R3为氢原子、C1-C6烷基或类似基团)。