Using C=C(OCC)[Sn](CCCC)(CCCC)CCCC, COC(=O)c1cc(Br)c2oc(N3CCO[C@H](C)C3)cc(=O)c2c1 to produce COC(=O)c1cc(C(C)=O)c2oc(N3CCO[C@H](C)C3)cc(=O)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.