Using O=C[O-], Ic1ccc2ncnc(Nc3ccc4c(cnn4Cc4ccccc4)c3)c2c1 to produce O=C(O)c1ccc2ncnc(Nc3ccc4c(cnn4Cc4ccccc4)c3)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.