What pattern of curved arrow pushing is the second step of this reaction? 
Definitions:
Minimum Number
The lowest quantity or amount that is allowed, required, or desired.
Coupon Rate
The percentage rate of interest a bond yields annually, based on its nominal value.
Yield To Maturity
The total return anticipated on a bond if it is held until the due date, considering all interest payments and the capital gain or loss.
Semiannually
Occurring twice a year; a term often used to describe the frequency of interest payment, dividends, or other financial events.
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