Using [NH4+], CCOC(=O)C(=O)CC(=O)/C=C/c1ccc(Cl)cc1 to produce CCOC(=O)/C(N)=C/C(=O)/C=C/c1ccc(Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.