Using COC(=O)c1cc2c(s1)c(C1CCCCC1)c(-c1ccc(O)cc1O)n2CCOC(C)=O to produce COC(=O)c1cc2c(s1)c(C1CCCCC1)c(-c1ccc(O)cc1O)n2CCO, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.