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(2R)-Octyl-α-hydroxyglutarate-d17 ((2R)-Octyl-2-HG-d17) is deuterium labeled (2S)-Octyl-α-hydroxyglutarate. (2S)-Octyl-α-hydroxyglutarate ((2S)-Octyl-2-HG) is a modified form of S-isomer 2-Hydroxyglutarate[1].

[1] Russak EM, et al. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019 Feb;53(2):211-216. DOI:10.1177/1060028018797110
[2] Sulkowski PL, et al. 2-Hydroxyglutarate produced by neomorphic IDH mutations suppresses homologousrecombination and induces PARP inhibitor sensitivity. Sci Transl Med. 2017 Feb 1;9(375). DOI:10.1126/scitranslmed.aal2463