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![Tandospirone impurity I ((3aR,4R,7S,7aS)-2-[4-(4-pyrimidin-2-ylpiperazin-1-yl)butyl]hexahydro-1H-4,7-methylheteropolyol-1,3-dione)](/upload/image/thumb/2_600_600_20250318202503181048.jpg)
(3R,4R)-3-methylamino-4-methylpiperidine (Tofacitinib impurity IM03-4)
