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- [7] Synthesis of 4-(2-(piperazin-1-yl)-7,8-dihydro-5H-thiopyrano[4,3-d] pyrimidin-4-yl)morpholine and 4-morpholino-2-(piperazin-1-yl)-7,8-dihydro-5H-thiopyrano[4,3-d]pyrimidine 6,6-dioxide MATERIAL SCIENCE, CIVIL ENGINEERING AND ARCHITECTURE SCIENCE, MECHANICAL ENGINEERING AND MANUFACTURING TECHNOLOGY II, 2014, 651-653 : 111 - 114