7-Chloro-2-oxo-5-phenyl-2,3-dihydro-1H-benzo[e][1,4]diazepine 4-oxide; 7-Chloro-5-pheny1-1,3-dihydro-2H-1,4-benzodiazepin-2-one 4-oxide; Chlordiazepoxide Impurity A (IP); 7-Chloro-1,3-dihydro-5-phenyl-2H-1,4-benzodiazepin-2-one 4-oxide; Oxazepam EP Impurity E