50654-88-1 BRN 2917467 O,O-Bis(4-bromo-2,5-dichlorophenyl) phenylphosphonothioate Phenylphosphonothioic acid O,O-bis(4-bromo-2,5-dichlorophenyl) ester Phosphonothioic acid, phenyl-, O,O-bis(4-bromo-2,5-dichlorophenyl) ester