Using Nc1cc2c3c(c(-c4ccccc4)[nH]c3c1)C=NNC2=O, O=C(O)Cn1cnnn1 to produce O=C(Cn1cnnn1)Nc1cc2c3c(c(-c4ccccc4)[nH]c3c1)C=NNC2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.