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- [10] Heterocyclic ring-closure reactions, part XI. The reaction of cyanothioformamide with isocyanates - Formation of a disulfide by reduction of a thiocarbonyl groupEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, 2001, 2001 (09) : 1695 - 1699Ketcham, RSchaumann, EAdiwidjaja, G