Complete the following reaction sequence,giving structural details of all key intermediates: 
Definitions:
Period Cost
Costs that are expensed in the period in which they are incurred, typically not directly tied to the production process and include selling, general, and administrative expenses.
Frosting
A sweet, creamy topping or coating made from sugar, butter, and flavorings, commonly used on cakes and pastries.
Product Cost
The total expenses incurred in the process of creating and manufacturing a product, including direct materials, direct labor, and manufacturing overhead.
Period Cost
Costs that are not directly associated with production and are charged as expenses in the period they occur.
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