Using CC(C)OC(OC(C)C)N(C)C, CCOC(=O)c1c[nH]c(C(C)=O)c1 to produce CCOC(=O)c1c[nH]c(C(=O)/C=C/N(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.