Using COc1nnc(Cl)cc1-c1cc2ccccc2n1C(=O)OC(C)(C)C to produce O=c1[nH]nc(Cl)cc1-c1cc2ccccc2[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.