Using CCn1ncc2c(NC3CCOCC3)c(C(=O)NNC(=O)OC(C)(C)C)c(C)nc21 to produce CCn1ncc2c(NC3CCOCC3)c(C(=O)NN)c(C)nc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.