Brexpiprazole (3,4)-Dihydro-2(1H)-quinolinone 7-(4-Hydroxybutoxy-4,4-d2)-2(1H)-quinolinone 2(1H)-Quinolinone,7-(4-chlorobutoxy)- Brexpiprazole Impurity 4 7,7'-(butane-1,4-diylbis(oxy))bis(quinolin-2(1H)-one) 4-BROMO-BENZO[B]THIOPHENE 5-HYDROXY-2(1H)-QUINOLINONE 8-(benzo[b]thiophen-4-yl)-5,8-diazaspiro[4.5]decan-5-ium chloride Brexpiprazole Impurity 21 (E)-N-(3-METHOXY-PHENYL)-3-PHENYL-ACRYLAMIDE Brexpiprazole Impurity 22 Brexpiprazole Impurity 18 Brexpiprazole Impurity 7 7-(4-chlorobutoxy)-1-{4-[(2-oxo-1,2-dihydroquinolin-7-yl)oxy]butyl}-1,2-dihydroquinolin-2-one Brexpiprazole Impurity 2 Brexpiprazole Impurity 5 HCl Thianaphthene Brexpiprazole Impurity 36