... Reactions of N-Aminothiouracils and v Ihiadiazolo[3,2—ajpyrimidinones TADAKAZU Tsun and YOSHIMI OTsUKA Department of ... thiadiazolo[8,2—a]pyrimidin—5—one derivatives, and further concerns with some chemical properties of ... (Tokyo), 19, 2530 (1971) ;- b) T. Tsuji and Y ...