Using COc1ccc2c(OCc3nnc4ccc(C5=CCN(C(=O)OC(C)(C)C)CC5)cn34)ccnc2c1 to produce COc1ccc2c(OCc3nnc4ccc(C5=CCNCC5)cn34)ccnc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.