(2S)-4-ethoxy-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic acid C11H21NO5 247.29
(2R)-4-ethoxy-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic acid C11H21NO5 247.29
4-ethoxy-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoic acid C11H21NO5 247.29
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