Using CCCCn1c(C)cc2ccccc21, O=C1OC(=O)c2c(Cl)c(Cl)c(Cl)c(Cl)c21 to produce CCCCn1c(C)c(C(=O)c2c(Cl)c(Cl)c(Cl)c(Cl)c2C(=O)O)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.