Praziquantel specified impurity B [EP]; Praziquantel related compound B [USP]; 4H-Pyrazino(2,1-a)isoquinolin-4-one,2-(cyclohexylcarbonyl)-2,3,6,7-tetrahydro; Praziquantel related compound B; Didehydro praziquantel; 2-(Cyclohexylcarbonyl)-2,3,6,7-tetrahydro-4H-pyrazino[2,1-a]isoquinolin-4-one; Praziquantel EP Impurity B; Praziquantel Impurity 2
