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

CAS Number
2831955-36-1(free base)
Alternate CAS Number
2857180-11-9 (HBr salt)
CAS Number
2725536-50-3 (free base)
Alternate CAS Number
2725536-51-4 (HBr salt)