Using COC(=O)C1=C(NC2CC2)OC(=Cc2c[nH]c3ncccc23)C1=O to produce O=C1C=C(NC2CC2)OC1=Cc1c[nH]c2ncccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.