Using OCCc1cn2nccnc2n1, CCOC(=O)CC1Cc2ccc(O)cc2CN(CC(F)(F)F)C1=O to produce CCOC(=O)CC1Cc2ccc(OCCc3cn4nccnc4n3)cc2CN(CC(F)(F)F)C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.