Using O=C1CN(C(=O)OCc2ccccc2)C=CN1CC1(O)CCN(c2ccncc2)CC1 to produce O=C1CNCCN1CC1(O)CCN(c2ccncc2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.