Using NCC(O)CN, CC1(C)C2CCC(CC2)C1CCC(=O)CCC1C2CCC(CC2)C1(C)C to produce CC1(C)C2CCC(CC2)C1CCC(CCC1C2CCC(CC2)C1(C)C)NCC(O)CN, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.