N-Acetyl-L-phenylalanine is an essential amino acid produced for medical feed and nutritional applications. It appears in large amount in urine of patients with phenylketonuria which is a human genetic disorder due to the lack of phenylalanine hydroxylase the enzyme necessary to metabolize phenylalanine to tyrosine.

GS-621763, a prodrug of GS-441524, exhibits antiviral activity against SARS-CoV-2 pathogenesis.

Cinchonidine is an alkaloid found in Cinchona officinalis. It is used in asymmetric synthesis in organic chemistry. It is a stereoisomer and pseudo-enantiomer of cinchonine.