20641-28-5 AI3-17767 BRN 1984002 NSC 404325 Phosphonic acid, ((4-chlorophenyl)hydroxymethyl)-, diethyl ester Phosphonic acid, (p-chloro-alpha-hydroxybenzyl)-, diethyl ester (8CI) alpha-Toluenephosphonic acid, p-chloro-alpha-hydroxy-, diethyl ester p-Chloro-alpha-hydroxy-alpha-toluenephosphonic acid diethyl ester