Which of the following is an intermediate in the mechanism for amide synthesis through acylation of an amine? 
Definitions:
Ordinary Annuity
A sequence of equal payments made at equal intervals of time, with the first payment occurring at the end of the period.
Compounded Quarterly
Interest calculation method where the interest is added to the principal amount every quarter, causing the interest to be calculated on the new total.
Deferred Annuity
An insurance contract in which payment of annuities is delayed to a future date.
Compounded Annually
The process where interest is calculated and added to the principal amount once every year, leading to an increase in the interest amount for the following year.
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