Using O=C1[C@H](Cc2c[nH]c3ccccc23)NCCN1CCc1ccccc1 to produce c1ccc(CCN2CCN[C@@H](Cc3c[nH]c4ccccc34)C2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.