Which of the following reagents would achieve the transformation shown below? 
Definitions:
Very Long Run
In microeconomics, a period of time long enough that technology can change and firms can introduce new products.
Derived Demand
The demand for a product or service that arises from the demand for another product or service it helps to produce.
Catgut
A type of cord made from the natural fibres of an animal's intestines, commonly used in the past for musical instrument strings and surgical sutures.
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