JPH203 dihydrochloride is a tyrosine analog, acts as a selective inhibitor of L-type amino acid transporter 1 (LAT1), and is used in cancer research.

N-acetyl Sulfamethoxazole is a metabolite of sulfamethoxazole, an antibiotic with antiviral activity, that can be detected in urine.

Vitamin A Propionate is an ester compound of vitamin A. In nutritional studies of foals, different doses have different effects on growth, serum biochemistry and hematological indicators. Too high or too low doses will produce adverse effects and are related to the vitamin A concentration in plasma, liver and kidneys.