TAKAHASHI, T Sulfur-containing pyridine derivatives. XLII. Synthesis of pyrido [2,3:2',3']-p-thiazine. (1). [electronic resource] - Pharmaceutical bulletin Dec 1954 - 382-8 p. digital Publication Type: Journal Article ISSN: 0369-9471 Standard No.: 10.1248/cpb1953.2.382 doi Subjects--Topical Terms: PyridinesSulfurThiazines