L-Phenylalanine-15N ((S)-2-Amino-3-phenylpropionic acid-15N) is the 15N-labeled L-Phenylalanine. L-Phenylalanine ((S)-2-Amino-3-phenylpropionic acid) is an essential amino acid isolated from Escherichia coli . L-Phenylalanine is a α2δ subunit of voltage-dependent Ca + channels antagonist with a K i of 980 nM.

(S)-crizotinib（IC50 of 72 nM）, an effective MTH1 (NUDT1) inhibitor, is the (S)-enantiomer of crizotinib.

Levamlodipine also known as S-amlodipine is a pharmacologically active enantiomer of amlodipine an antihypertensive and anti-anginal medication.