Using COc1cc(CN2CCNCC2)cc(OC)c1OC, O=C(O)c1ccc2c(c1)CCCC2=O to produce COc1cc(CN2CCN(C(=O)c3ccc4c(c3)CCCC4=O)CC2)cc(OC)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.