Using O=c1ccc(-c2c(-c3ccccc3)nn3ccccc23)n[nH]1, C=CC(=O)OC to produce COC(=O)CCn1nc(-c2c(-c3ccccc3)nn3ccccc23)ccc1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.