What is the product,A,that would be obtained from the following reaction sequence? 
Definitions:
Perimenopause
The transitional period leading up to menopause, during which a woman may experience changes in her menstrual cycle, symptoms of hormonal fluctuation, and the end of her reproductive years.
Menstrual Cycle
The regular natural change that occurs in the female reproductive system, making pregnancy possible.
Fertile
Capable of reproducing or supporting the growth of offspring; often used in reference to soil quality or the reproductive capability of living organisms.
Menopause
A natural biological process in women marking the end of reproductive years, characterized by the cessation of menstruation.
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