;(R)-tert-Butyl 3-hydroxy-2-methyl-5-oxo-2,5-dihydro-1H-pyrrole-1-carboxylate;(R)-3-HYDROXY-2-METHYL-5-OXO-2,5-DIHYDRO-PYRROLE-1-CARBOXYLIC ACID TERT-BUTYL ESTER
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