Using C1=COCCC1, Cc1c(O)cc2c(c1C)OC(C)(CCC(=O)O)CC2 to produce Cc1c(OC2CCCCO2)cc2c(c1C)OC(C)(CCCO)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.