there are described 1 - azoniabicyclooct - 1 - ene salt derivatives inclusive of 1 - azonia - 4 , 6 - dimethylbicyclooct - 1 - ene perchlorate , and a process for the preparation of the same . the derivatives can be prepared by heating dicyclopropylmethanimine salt derivative in a solvent , in the presence or absence of an ammonium salt . each of the derivatives is employed as an intermediate for preparing various medicines and agricultural chemicals .