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4,4-difluorobutanoic acid: BD223278944328-72-795%; ￥987.0100mg

2,2-Difluorobutanoic acid: BD644442366-62-395%; ￥756.01g

(S)-2-Amino-4,4-difluorobutanoic acid: BD00984043121960-22-395%; ￥3089.01g

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