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isa:305874328
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The novel compounds of this invention represented by formula I may be prepared by reactions of piperazines of formula III in which A is as defined above with isothiocyanates of formula IV in which B is as defined above. ##STR3## These reactions may be conducted in organic solvents such as ether, tetrahydrofuran, and methylene chloride at temperatures of from room temperature or below up to the boi
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