BasisAr[4]={d[3],d[6],d[7]}

d[1]=CD[1,2,3,4,1,2,3,4]:=
  d[3]+2d[6]-d[7]

d[2]=CD[1,2,3,1,4,3,2,4]:=
  d[3]-d[6]+d[7]

d[3]=CD[1,2,3,1,4,2,3,4]:=
  d[3]

d[4]=CD[1,2,1,3,4,2,4,3]:=
  d[6]-d[7]

d[5]=CD[1,2,1,3,4,2,3,4]:=
  2d[6]-d[7]

d[6]=CD[1,2,1,3,2,4,3,4]:=
  d[6]

d[7]=CD[1,2,1,2,3,4,3,4]:=
  d[7]