Using COC(=O)c1cc(Cc2c(C)c(OC)c(OC)c(OC)c2OC)ccc1Oc1cccc(OC)c1 to produce COc1cccc(Oc2ccc(Cc3c(C)c(OC)c(OC)c(OC)c3OC)cc2C(=O)O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.