Sulfur-containing pyridine derivatives. XLIII. Synthesis of pyrido[2,3:2',3']-p-thiazines. (2).
D011725:Pyridines; D013455:Sulfur; D013843:Thiazines
D011725:Pyridines; D013843:Thiazines; D013455:Sulfur; C023666:pyridine
PYRIDINES/preparation of