In the title salt. C26H27F2N2+·C4H5O4−. the piperazine N atom bearing the vinylic substituent is protonated. The piperazine ring adopts a chair conformation. https://safeersappliancers.shop/product-category/bosch-hba5780s0b-serie-6-multifunction-electric-built-in-single-oven/