Using COc1ccc(-c2c(-c3ccccc3)oc3ncnc(OCC(C)COCC(=O)OC(C)(C)C)c23)cc1 to produce COc1ccc(-c2c(-c3ccccc3)oc3ncnc(OCC(C)COCC(=O)O)c23)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.