malathion

Etymology
From a trade name.

Noun

 * 1) An organophosphorus insecticide, Diethyl [(dimethoxyphosphinothioyl)-thio]butanedioate.
 * "Although effective in degrading pesticides with P-O bonds, washing of the vegetables sprayed with the thiolester organophosphate insecticide malathion with the enzyme did not yield any improved degradation."