InChI=1/C16H19ClNO3P/c1-4-20-22(19,21-5-2)16-14(17)11-12(3)18-15(16)13-9-7-6-8-10-13/h6-11H,4-5H2,1-3H diethyl (4-chloro-6-methyl-2-phenylpyridin-3-yl)phosphonate phosphonic acid, (4-chloro-6-methyl-2-phenyl-3-pyridinyl)-, diethyl ester