Yes. See for example any number of nerve agents such as VX. https://en.wikipedia.org/wiki/VX_(nerve_agent) https://en.wikipedia.org/wiki/VX_(nerve_agent). Yes,

Yes. See for example any number of nerve agents such as VX. https://en.wikipedia.org/wiki/VX_(nerve_agent) https://en.wikipedia.org/wiki/VX_(nerve_agent). Yes, you can quibble over whether they count as "phosphates" given they often have fluoryl or other substituents, but the class is generally referred to as organophosphates, and they certainly have phosphorous in them. Malathion, is also an organophosphate which acts via the same pathway, but only in insects.