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organic compounds
The crystal structure of the title compound, C19H22N4OS, is described. The isothiazolopyridine part of the molecule is planar, while the piperazine ring adopts a slightly deformed chair conformation. The structure is stabilized by a network of weak C—HX hydrogen bonds, and the conformation of the phenylpiperazine substituent may be influenced by a C—HS intramolecular short contact.