Using O=c1c2c([nH]c3ccccc13)Cc1c([nH]c3ccccc3c1=O)C2 to produce O=c1c2ccccc2[nH]c2cc3c(=O)c4ccccc4[nH]c3cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.