Using O=C(O)c1ccc2[nH]c(-c3cc4ccccc4[nH]c3=O)nc2c1, CC(C)(C)OC(=O)N1CCNCC1 to produce O=C(c1ccc2[nH]c(-c3cc4ccccc4[nH]c3=O)nc2c1)N1CCNCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.