0  B8R0.23  C\C(=C/C(=O)[O-])\C(=O)[O-] Mesaconate-trans [0,2,0,0,0,0|1,0,1]=4
1  B8R0.23  C\C(=C\C(=O)[O-])\C(=O)[O-] Mesaconate-cis [0,2,0,0,0,0|1,0,1]=4