Using CC(=O)N1CCC(CCC(=O)c2cc3c4c(c2)CCN4C(=O)CC3)CC1 to produce O=C(CCC1CCNCC1)c1cc2c3c(c1)CCN3C(=O)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.