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