Using [N-]=[N+]=[N-], O=C(CCl)Nc1c2c(nc3ccccc13)CCCC2 to produce [N-]=[N+]=NCC(=O)Nc1c2c(nc3ccccc13)CCCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.