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Nantaka Khorana. 1994. Synthesis of 2-Thiooxopyrimido-(4,3-d)-quinoline-4-one derivatives. Graduate School, Chulalongkorn University;
Nantaka Khorana. (1994) Synthesis of 2-Thiooxopyrimido-(4,3-d)-quinoline-4-one derivatives . Chulalongkorn University/Bangkok.
Nantaka Khorana. Synthesis of 2-Thiooxopyrimido-(4,3-d)-quinoline-4-one derivatives. . Bangkok:Chulalongkorn University, 1994.
Nantaka Khorana. (1994) Synthesis of 2-Thiooxopyrimido-(4,3-d)-quinoline-4-one derivatives . Chulalongkorn University/Bangkok.