octamethylpyrophosphoramide

oc·ta·meth·yl·py·ro·phos·phor·a·mide

noun
\-ˌmeth-əl-ˌpī-rō-ˌfäs-ˈfȯr-ə-ˌmīd\

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