Using COc1nnc2c(NC(C)C)nc3cc(C=O)ccc3n12, C1COCCN1 to produce COc1nnc2c(NC(C)C)nc3cc(CN4CCOCC4)ccc3n12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.