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![Zopiclone impurity B; 6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo[3,4-b]pyrazin-5-one](/upload/image/thumb/2_600_600_20250318202503181048.jpg)
Ethyl (2R,3S)-3-(benzoylamino)-2-hydroxybenzenepropanoate
