| abstract |
New Esters Abstract of the Disclosure 2,2-Dimethyl-4,5-benzospiro(2,4)heptane- and 2,2-dimethyl-4,5-benzospiro(2,4)-hepta-4,6-diene-1-carboxylates of the formula wherein each of R1 and R2 represents a hydrogen atom or together represent a carbon to carbon bond, and R3 represents a hydrogen atom or a cyano group, process for their manufacture and a method of controlling pests, which comprises the use of these compounds. |