Using CCOC(=O)C=CC=CC1(C)Cc2c(C)c(OC(C)=O)c(OC)c(OC)c2O1 to produce CCOC(=O)CCCCC1(C)Cc2c(C)c(OC(C)=O)c(OC)c(OC)c2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.