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Schröder R, Nielsen H, Lefèvre J P. "Method for the Synthesis of Z-Pro-Gly-OH" [P]. European Patent, EP 3986168 A1, 2024-03-14.
Martínez F, Sørensen M, Schröder R. "A Process for Preparing High-Purity Z-Pro-Gly-OH" [P]. European Patent, EP 3201675 A1, 2023-01-15.
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