4-Methylpyridazine 2-oxide

    Parameter     ppm  Hz

      D(A)         8.38
      D(B)         6.99
      D(C)         8.08
      D(D)         2.37
       J(A,B)          5.6
       J(A,C)          0.5
       J(A,D)          0.2
       J(B,C)          0.7
       J(B,D)          0.7
       J(C,D)          0.7
     
     TORI,K. ET AL. CHEM.PHARM.BULL. 11, 235 (1963)