Using COc1ncc([N+](=O)[O-])cc1Br, C=C(OCC)[Sn](CCCC)(CCCC)CCCC to produce COc1ncc([N+](=O)[O-])cc1C(C)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.