MEPHOBARBITAL

    Assign.     Shift(ppm)

      A            11.93
      B             7.38
      C             7.35
      D             7.31
      E             3.194
      F     *1      2.35
      G     *1      2.32
      J             0.859
     
     J(F,G)=-13.2Hz
     J(E,J)=J(F,J)=7.2Hz
  

       ppm   Int.  Assign.

      170.87   279      1 *
      170.28   468      2 *
      150.08   388      3
      138.48   398      4
      128.92  1000      5
      128.12   378      6
      126.11   955      7
       60.33   433      8
       29.10   209      9
       27.64   179     10
        9.60   299     11