Using O=C1OCc2ccccc21, Cc1ccc2c(N3CCN(CCc4cccc(N)c4)CC3)cccc2n1 to produce Cc1ccc2c(N3CCN(CCc4cccc(N5Cc6ccccc6C5=O)c4)CC3)cccc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.