An extremely potent cholinesterase inhibitor, similar to sarin and tabun.

Soman, also known by its NATO designation GD (O-Pinacolyl methylphosphonofluoridate) is an extremely toxic substance whose sole application is as one of the world's most dangerous military weapons. It is a nerve agent, interfering with normal functioning of the mammalian nervous system. As a chemical weapon, it is classified as a weapon of mass destruction by the United Nations according to UN Resolution 687, and its production is strictly controlled and stockpiling outlawed by the Chemical Weapons Convention of 1993.