Using O=C1CCCN1c1cccc(C2CCNCC2)c1, CCn1c2ccccc2c2cc(C(C)=O)ccc21 to produce CCn1c2ccccc2c2cc(CN3CCC(c4cccc(N5CCCC5=O)c4)CC3)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.