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6-Oxo-piperidine-2-carboxylic acid: BD37563770-22-795%; ￥311.01g

(S)-2-Piperidinone-6-carboxylic acid: BD375434622-39-497%; ￥4611.025g

(R)-6-Oxopiperidine-2-carboxylic acid: BD12333072002-30-398%; ￥426.01g

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