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Roberts E F, Fischer A B, Patel M V. "Method for the Synthesis of N-Methyl-d3-glycine HCl" [P]. US Patent, US 9039924 B2, 2023-07-05.
Yamamoto T, Fischer A B, Anderson J P. "A Process for Preparing High-Purity N-Methyl-d3-glycine HCl" [P]. US Patent, US 10628730 B2, 2020-11-06.
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