Number | Date | Country | Kind |
---|---|---|---|
96 12066 | Oct 1996 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
4841009 | Kelsey | Jun 1989 |
Entry |
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Igeta, H. et al, "Studies on Pyrazines. XV. N-Oxidation of 3,3'-Bipyrazines and Reactions of Their N-Oxides", Chemical and Pharmaceutical Bulletin, vol. 18, No. 7, 1970, pp. 1340-1346. |