Using CCO, Nc1nc(-c2c[nH]c3ccccc23)c2cc(C(=O)O)sc2n1 to produce CCOC(=O)c1cc2c(-c3c[nH]c4ccccc34)nc(N)nc2s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.