2-Chloro-N,N-diethyl-4-hydroxybenzenesulfonamide O,O-diethyl phosphorothioate 30979-15-8 BRN 2181184 Phosphorothioic acid, O,O-diethyl ester, O-ester with 2-chloro-N,N-diethyl-4-hydroxybenzenesulfonamide