What substitution reaction mechanism is most likely for the following compound? 
Definitions:
Rate of Return
The earnings or losses experienced with an investment over a specific duration, depicted as a percentage of the investment's original expense.
Net Asset Value
The total value of all the securities held by a mutual fund or ETF, minus any liabilities, divided by the number of shares outstanding.
Year-End Assets
The total value of all assets an entity owns at the end of an accounting period or fiscal year.
Liabilities
Financial obligations or debts a company owes to outside parties, which must be settled over time through the transfer of economic benefits.
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