Using COC(=O)CC(CCCCNCc1ccc2c(n1)NCCC2)c1cnc2ccccc2c1 to produce O=C(O)CC(CCCCNCc1ccc2c(n1)NCCC2)c1cnc2ccccc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.