(2Z)-2-Butenoic acid methyl ester

    Parameter     ppm  Hz

      D(A)         6.28
      D(B)         5.72
      D(C)         2.14
       J(A,B)         11.4
       J(A,C)          7.27
       J(B,C)         -1.82
     
      D(D)         3.64
     
     FRASER,R.R. & MCGREER,D.E. CAN.J.CHEM. 39, 505 (1961)