1,2,4-Triazine chemistry. 10. Dihydro-1,2,4-triazines: structural studies of 5,6-diaryldihydro-1,2,4-triazines through the reactions with dimethyl acetylenedicarboxylate
1,2,4-Triazine chemistry. 11. Dihydro-1,2,4-triazines: structural studies on sodium borohydride reduction products from some 3-methylthio- and 3-methoxy-1,2,4-triazines