Using CCc1nnc(-c2ccccc2)c2nc(O)c(C3CCCC3)n12, CCn1ncnc1CO to produce CCc1nnc(-c2ccccc2)c2nc(OCc3ncnn3CC)c(C3CCCC3)n12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.