Using [NH4+], CCOC(=O)COc1ccc2c(c1)CC(NCc1ccccc1)CCC2 to produce NC(=O)COc1ccc2c(c1)CC(NCc1ccccc1)CCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.