Metrifonate
（重定向自Trichlorfon）
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Metrifonate (INN) or trichlorfon (USAN) is an irreversible organophosphate acetylcholinesterase inhibitor. It is a prodrug which is activated non-enzymatically into 2,2-dichlorovinyl dimethyl phosphate (DDVP).
It is used as an insecticide.
It can be used to treat schistosomiasis caused by Schistoma haematobium, but is no longer commercially available.