Using O=C(CN1CCCN2CCCN(CCCN(CC(=O)OCc3ccccc3)CC2)CC1)OCc1ccccc1 to produce O=C(O)CN1CCCN2CCCN(CCCN(CC(=O)O)CC2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.