2720-17-4 AI3-27373 BRN 2290299 CELA K-37 ENT 27,373 K 37 NSC 190967 O-(4-Bromo-2,5-dichlorophenyl) O-ethyl ethylphosphonothioate Phosphonothioic acid, ethyl-, O-(4-bromo-2,5-dichlorophenyl) O-ethyl ester