Novel uracils of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 8 carbon atoms, halogen and --C(Hal).sub.3, Hal is halogen and R.sub.2 is hydrogen or R.sub.1 and R.sub.2 taken together with the benzene ring to which they are attached form a system of two coupled rings optionally containing at least one heteroatom having selective herbicidal activity.
该文献描述的是式子为##STR1##的新型尿
嘧啶类化合物,其中R1取自由1到8个碳原子的烷基、1到8个碳原子的烷氧基、卤素和--C(Hal)3,Hal是卤素,R2是氢或R1和R2结合在一起与它们附着的苯环形成一个含有至少一个异原子的两个耦合环的系统,该化合物具有选择性除草活性。