Using CCCCCCN=C=O, O=C1NC2(CCCCC2)NC12CCCCC2 to produce CCCCCCNC(=O)N1C(=O)C2(CCCCC2)NC12CCCCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.