Using CCCc1c(OCCCCCC(=O)c2c(C)c(C)c(OC)c(OC)c2C)ccc(C(=O)O)c1O to produce CCCc1c(OCCCCCC(=O)c2c(C)c(C)c(O)c(O)c2C)ccc(C(=O)O)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.