Using CCCn1c(C)nc2ccc(C(=O)c3nc(-c4cccc(C(=O)OC)c4)c4ccccn34)cc2c1=O to produce CCCn1c(C)nc2ccc(C(=O)c3nc(-c4cccc(C(=O)O)c4)c4ccccn34)cc2c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.