Impurities are undesirable chemical components that remain in the active pharmaceutical ingredient during formulation. Impurities may reduce a product's efficacy.

CAS Number
91374-21-9
Alternate CAS Number
91374-20-8(HCl Salt)
CAS Number
STD-147098-20-2 ; Ketone-1422514-05-3 ; Lactone- 503610-43-3; Diastereomers- NA;
CAS Number
1092939-17-7
Alternate CAS Number
941678-49-5(free base);2803478-47-7(hemifumarate salt);1883417-29-5(oxalate salt)
CAS Number
1000370-27-3
Alternate CAS Number
1000370-30-8(HCl Salt)