octamethylpyrophosphoramide

noun
oc·ta·meth·yl·py·ro·phos·phor·a·mide | \-ˌmeth-əl-ˌpī-rō-ˌfäs-ˈfȯr-ə-ˌmīd \

Medical Definition of octamethylpyrophosphoramide 

: an almost odorless viscous liquid anticholinesterase C8H24N4O3P2 that is marketed as a systemic insecticide and has been used to treat myasthenia gravis

called also OMPA, schradan

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