Shikuropuropann11karubonsanno22 1 3 butajeniru chikanjudotai sorenoshokubutsuoyobionketsudobutsunokiseichunitaisurusho korenisotosurusoseibutsu soreraoganjusuruhokoseisoseibutsu soreranoseizohonarabNovel 3-(buta-1',3'-dienyl)-cyclopropane-1-carboxylic acid compounds of the formula I wherein X1 ...