Using O=C1NN=C2CN(C(=O)OCc3ccccc3)Cc3[nH]c4cccc1c4c32 to produce O=C1NN=C2CNCc3[nH]c4cccc1c4c32, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.