Use the following structure for the two questions below.
Saquinavir Structure 
-Which functional group occurs more than two times in the structure of the HIV protease inhibitor drug called Saquinavir?
Definitions:
Existing Monopolies
Firms that have exclusive control over a market or product, allowing them to set prices higher than in competitive markets due to a lack of alternatives.
Interest-Rate Cost
The expense associated with borrowing funds, expressed as a percentage of the total borrowed amount.
R&D Expenditure
Financial spending devoted to research and development activities by a company or organization.
Imitation
The action of using someone or something as a model and trying to replicate or emulate their behavior, process, or product.
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