1H-1,3,2-Benzodiazaphosphole, 5-chloro-2-ethyl-2,3-dihydro-, 2-oxide (9CI) 5-Chloro-2,3-dihydro-2-ethyl-1H-1,3,2-benzodiazophosphole-2-oxide 73790-34-8 Ethylphosphonic diamide cyclic 4-chloro-o-phenylene ester NSC 113115 Phosphonic diamide, ethyl-, cyclic 4-chloro-o-phenylene ester