Cis Lurasidone is a diastereomeric impurity of Lurasidone, characterized by the *cis* relative stereochemistry of the two substituents attached to the cyclohexyl ring. Specifically, it possesses a 1,2-cis orientation of the [(hexahydro-4,7-methano-2H-isoindol-1,3-dion-2-yl)methyl] group and the [[4-(1,2-benzisothiazol-3-yl)piperazin-1-yl]methyl] group. This contrasts with the *trans* configuration present in the therapeutically active (1R,2R) Lurasidone. The compound retains the benzisothiazole, piperazine, and glutarimide-derived isoindol-1,3-dione core structures.
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C1CC[C@H]([C@@H](C1)CN2CCN(CC2)C3=NSC4=CC=CC=C43)CN5C(=O)[C@H]6[C@@H]7CC[C@@H](C7)[C@H]6C5=O.Cl
InChI=1S/C28H36N4O2S.ClH/c33-27-24-18-9-10-19(15-18)25(24)28(34)32(27)17-21-6-2-1-5-20(21)16-30-11-13-31(14-12-30)26-22-7-3-4-8-23(22)35-29-26;/h3-4,7-8,18-21,24-25H,1-2,5-6,9-17H2;1H/t18-,19+,20-,21-,24+,25-;/m0./s1
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