74038-45-2 NSC221126 Phosphonic acid, (.alpha.-hydroxy-p-methoxybenzyl)-, diethyl ester, ester with bis(2-chloropropyl) antimonate (III) Phosphonic acid, [[[bis(2-chloropropoxy)stibino]oxy](4-methoxyphenyl)methyl]-, diethyl ester [.alpha.-(Diethoxyphosphinyl)-p-methoxybenzyl]bis(2-chloropropyl)antimonite