title: Use of chiral isopropyl groups in biosynthesis. Synthesis of (2RS,3S)-(4-13C)valine.
mesh_terms: D002247:Carbon Isotopes; D008722:Methods; D013237:Stereoisomerism; D014633:Valine / Q000138:chemical synthesis*
chemical_list: D002247:Carbon Isotopes; D014633:Valine