Using O=C(CCN1CC2CC=CCC1CN2c1ccc2ccccc2c1)c1csc2ccccc12 to produce OC(CCN1CC2CC=CCC1CN2c1ccc2ccccc2c1)c1csc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.