(R)-2-amino-3-((carboxymethyl)thio)propanoic acid-13C3; S-Carboxymethyl-L-cysteine-13C3; (2R)-2-Amino-3-[(carboxymethyl)thio]propionic Acid-13C3; (R)-S-(Carboxymethyl)cysteine-13C3; (L)-2-Amino-3-(carboxymethylthio)propionic Acid-13C3; 3-[(Carboxymethyl)thio]-L-alanine-13C3; AHR 3053-13C3; Bronchokod-13C3; Carbocisteine-13C3; Carbocit-13C3; Carbocysteine-13C3; Chilvax-13C3; DF 1794Y-13C3; L-(Carboxymethyl)cysteine-13C3; LJ 206-13C3; Lisil-13C3; Lisomucil-13C3; Loviscol-13C3; Muciclar-13C3; Mucocis-13C3; Mucodyne-13C3; Mucofan-13C3; Mucolase-13C3; Mucolex-13C3; Mucopront-13C3; Mucosol-13C3; Mucotab-13C3; Mukinyl;-13C3 NSC 14156-13C3; PectDrill-13C3; Pectox-13C3; Pulmoclase-13C3; Reomucil-13C3; Rhinathiol-13C3; Rhinatiol-13C3; Rinatiol-13C3; S-(Carboxymethyl)-(R)-cysteine-13C3; S-Carboxylmethyl-L-cysteine-13C3; Siroxyl-13C3; Thiodril-13C3; Transb