Using COC(=O)Cc1c(C)nc2sc(-c3ccc(OC)cc3)nn12, COC=O to produce COC=C(C(=O)OC)c1c(C)nc2sc(-c3ccc(OC)cc3)nn12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.