(S)-2-Ammonio-3-oxylatophosphonylpropionic acid
(S)-2-Ammonio-3-oxylatophosphonylpropionic acid ??
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(S)-2-Ammonio-3-oxylatophosphonylpropionic acid ?? ?? ? ???
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(S)-2-Ammonio-3-oxylatophosphonylpropionic acid ?? ??
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