4-Methylpyridazine 1-oxide

    Parameter     ppm  Hz

      D(A)         8.35
      D(B)         7.57
      D(C)         8.17
      D(D)         2.36
       J(A,B)          2.8
       J(A,C)          0.5
       J(A,D)          0.2
       J(B,C)          6.2
       J(B,D)          0.5
       J(C,D)          0.2
     
     TORI,K. ET AL. CHEM.PHARM.BULL. 11, 235 (1963)