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Synthesis of some 4-thiouredo-2,2,6,6-tetramethyl-piperidine-1-oxyls
ZHANG ZIYI;YANG HU;TAN LONGQUAN;LIU LISHENG;ZHENG RONGLIANG;SONG QING
Chin. J. Org. Chem. . 1987, (1): 70 -72 .