Using COc1c2ccccc2c(-c2c(-c3c4ccccc4c(OC)c4ccccc34)c2=O)c2ccccc12 to produce O=c1c(-c2c3ccccc3c(O)c3ccccc23)c1-c1c2ccccc2c(O)c2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.