A 2,2-dimethylcyclopropanecarboxylic acid derivative having the formula: ##STR1## wherein R.sup.1 is an alkyl group or an aryl group, R.sup.2 is a hydrogen atom, an acyl group, a sulfonyl group or an alkyl group, and each of X.sup.1 and X.sup.2 is a halogen atom.
一种具有以下式子的2,2-二
甲基环丙烷羧酸衍
生物:##STR1## 其中R1是烷基或芳基,R2是氢原子,酰基,磺酰基或烷基,X1和X2中的每一个都是卤素原子。