What is the best choice of reagent(s) to perform the following transformation? 
Definitions:
Call Option
A financial contract that gives the buyer the right, but not the obligation, to buy an asset at a specified price within a specified period.
Premium
The amount paid for an option or insurance policy over its intrinsic value or the amount by which the price of a bond exceeds its face value.
Exercise Price
The price level at which an option owner has the right to carry out a purchase (for calls) or a sale (for puts) of the asset in question.
Premium
The amount by which the price of a financial instrument or asset exceeds its face value or the cost above the normal or standard rate.
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