Using COCCc1nc2c(N)nc3ccccc3c2n1CC1(O)CCOCC1 to produce Nc1nc2ccccc2c2c1nc(CCO)n2CC1(O)CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.