Synonyms: Pyridinium,2-(4-ethyl-1,6-dimethyl-3,5-dioxa-2-aza-4-phosphahept-1-en-1-yl)-1-methyl-,iodide, P-oxide; Pyridinium, 2-acetyl-1-methyl-, iodide, oxime, isopropylethylphosphonate (8CI); Phosphonic acid, ethyl-, isopropyl ester,O-[[1-(1-methyl-2-pyridiniumyl)ethylidene]amino] deriv. (8CI); Phosphonic acid,ethyl-, monoisopropyl ester, O-[1-(1-methylpyridinium-2-yl)ethylidene]aminoderiv., iodide; Phosphonic acid, ethyl-, monoisopropyl ester,O-[[1-(1-methyl-2-pyridinio)ethylidene]amino] deriv.;2-Acetyl-1-methylpyridinium iodide oxime O-(O-2-propyl ethylphosphonate);2-O-(Isopropyl ethylphosphono)-acetyl-1-methylpyridinium iodide oxime; Tx 54;Tx 54 (enzyme inhibitor)