Pyridazine and Pyrazine Rings: (Cinnolines, Phthalazines, and Quinoxalines)EbookPyridazine and Pyrazine Rings: (Cinnolines, Phthalazines, and Quinoxalines)byJ. C. SimpsonRating: 0 out of 5 stars0 ratingsSave Pyridazine and Pyrazine Rings: (Cinnolines, Phthalazines, and Quinoxalines) for later