Diurethanes of the formula ##STR1## wherein R.sub.1 is alkyl, alkenyl or halogenoalkyl and R.sub.2 is phenyl or phenyl substituted in one or more places by the same or different substituents selected from the group consisting of halogen, trifluoromethyl, alkyl and alkoxy.
化合物的分子式为##STR1## 其中R.sub.1是烷基,烯基或卤代烷基,R.sub.2是苯或苯在一个或多个位置上被相同或不同的取代基所取代,所述取代基被选自卤素,三
氟甲基,烷基和烷氧基组成的群体。