Using CN1CCN(Cc2c(C=O)c(I)nc3cc4c(cc23)OCCO4)CC1 to produce CN1CCN(Cc2c(CO)c(I)nc3cc4c(cc23)OCCO4)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.