5,5'-Bis(2-(4-(benzo[d]isothiazol-3-yl)piperazin-1-yl)ethyl)-6,6'-dichloro-3-hydroxy-3,3'-biindoline-2,2'-dione Ziprasidone Related CoMpound C 5,5'-Bis[2-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]ethyl]-6,6'-dichloro-1,1',3,3'-tetrahydro-3-hydroxy-[3,3'-bi-2H-indole]-2,2'-dione Ziprasidone EP Impurity D Ziprasidone Impurity 4（Ziprasidone EP Impurity D） [3,3'-Bi-2H-indole]-2,2'-dione, 5,5'-bis[2-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]ethyl]-6,6'-dichloro-1,1',3,3'-tetrahydro-3-hydroxy- Ziprasidone?EP Impurity D/ Ziprasidone?Related Compound C (Ziprasidone Dimer) Ziprasidone Dimer