2-Ethoxycarbonyl-1-methylvinyl cyclohexyl methylphosphonate

2-Ethoxycarbonyl-1-methylvinyl cyclohexyl methylphosphonate is an extremely toxic organophosphate nerve agent. It is the cyclohexyl methylphosphonate ester of ethyl acetoacetate. The compound has two isomers, the cis isomer and trans isomer, with the trans isomer being more toxic.