Using COC(=O)Cc1nn(-c2ccccn2)c2[nH]c3ccccc3c(=O)c12 to produce O=C(O)Cc1nn(-c2ccccn2)c2[nH]c3ccccc3c(=O)c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.