Using COc1c(OC)c(OC)c2c(=O)c3ccc(OCc4ccccc4)c(OC)c3[nH]c2c1OC, O=C([O-])[O-] to produce COc1c(OC)c(OC)c2c(c1OC)c(=O)c1ccc(OCc3ccccc3)c(OC)c1n2C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.