Aspartame

Aspartame impurity A - 2-(5-benzyl-3,6-dioxopiperazin-2-yl)acetic acid (diketopiperazine)

Aspartic acid

Astragaloside IV

Atenolol

Atenolol for system suitability

Atomoxetine for impurity A - identification N-methyl-3-phenoxy-3-phenylpropan-1-amine

Atomoxetine hydrochloride

Atomoxetine impurity B - (3S)-N-methyl-3-(2-methylphenoxy)-3-phenylpropan-1- amine

Atomoxetine impurity D - (3R)-N-methyl-3-(3-methylphenoxy)-3-phenylpropan-1- amine