Aromatic methyl derivative + fumarate > Aromatic methylsuccinate derivative
[H][C:1]([H:18])([H:19])[c:4]1[c:12]([H])[c:13]([H])[c:14]([H])[c:15](-[#6,#8,#9:17])[c:16]([H])1>>[H:19][C:1]([H:18])([#6](-[#6]-[#6](-[#8-])=O)-[#6](-[#8-])=O)[c:4]1[c:12]([H])[c:13]([H])[c:14]([H])[c:15](-[#6,#8,#9:17])[c:16]([H])1
[H][C:1]([H:18])([H:19])[c:4]1[c:12]([H])[c:13]([H])[c:14]([H])[c:15](-[#6,#8,#9:17])[c:16]([H])1
None
[H:19][C:1]([H:18])([#6](-[#6]-[#6](-[#8-])=O)-[#6](-[#8-])=O)[c:4]1[c:12]([H])[c:13]([H])[c:14]([H])[c:15](-[#6,#8,#9:17])[c:16]([H])1
None
