Using O=CO, CCCC(NC(=O)Cc1cc(F)cc(F)c1)C(=O)Nc1cn(C2CCNCC2)cn1 to produce CCCC(NC(=O)Cc1cc(F)cc(F)c1)C(=O)Nc1cn(C2CCN(C)CC2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.