Using CSc1nc2c(ccn2Cc2ccc(C(=O)c3ccc(Cl)cc3)cc2)c(=O)n1CCOC(C)=O to produce CSc1nc2c(ccn2Cc2ccc(C(=O)c3ccc(Cl)cc3)cc2)c(=O)n1CCO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.