The invention relates to novel phenylcarbamoylbarbituric acid derivatives of the general formula ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.3 alkoxy, allyl or C.sub.3 -C.sub.6 cycloalkyl, R.sub.2 is C.sub.1 -C.sub.4 alkyl or allyl, R.sub.3 is an unsubstituted or substituted heteroaromatic 6-membered ring which contains 2 or 3 nitrogen atoms, or is an unsubstituted or substituted heteroaromatic 6-membered ring which is fused to a benzene ring and which contains 1 to 3 nitrogen atoms, R.sub.4 and R.sub.5 are each independently of the other hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or C.sub.1 -C.sub.3 haloalkyl and X is an oxygen or sulfur atom, and to the tautomers and salts thereof. These compounds may be used for controlling helminths which are parasites of animals.
本发明涉及一种新的苯基
氨基甲基
巴比妥酸衍
生物,其一般式为##STR1##其中R.sub.1是C.sub.1-C.sub.4烷基,C.sub.1-C.sub.3烷氧基,烯丙基或C.sub.3-C.sub.6环烷基,R.sub.2是C.sub.1-C.sub.4烷基或烯丙基,R.sub.3是未取代或取代的含有2或3个氮原子的杂芳6元环,或未取代或取代的与苯环融合的含有1至3个氮原子的杂芳6元环,R.sub.4和R.sub.5各自独立地为氢、C.sub.1-C.sub.4烷基、C.sub.1-C.sub.4烷氧基或C.sub.1-C.sub.3卤代烷基,X为氧或
硫原子,以及它们的互变异构体和盐。这些化合物可用于控制寄生于动物的蠕虫。