2-(4-Chlorophenyl)-5-ethoxy-4-oxa-3,6-diaza-5-phosphanon-2-enenitrile 5-oxide 4-Oxa-3,6-diaza-5-phosphanon-2-enenitrile, 2-(4-chlorophenyl)-5-ethoxy-, 5-oxide 67430-32-4 BRN 2894731