| 摘要 |
OF INVENTION Compounds of the formulae: and wherein: R1, R2, R3 and R4 are independently hydrogen, lower alkyl of one to six carbon atoms, acyl, aryl, substituted aryl, or arylloweralkyl; are advantageously converted to isocyanurate compounds, 2-(2-thienyl)ethylamine compounds and thieno¢3,2-c!pyridine derivatives and the pharmaceutically acceptable salts thereof, particularly ticlopidine hydrochloride. 10244 77350-FF
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