What is the best choice of reagent to achieve the following transformation? 
Definitions:
Unique Goods
Items that are distinct in their characteristics, often irreplaceable, and cannot be substituted easily due to their rarity or specific traits.
Breach of Warranty
Occurs when a seller fails to uphold a claim or promise about a product or service.
Discovered the Defect
Discovering the defect involves identifying a flaw or fault in a product or property, usually after a transaction has taken place, impacting the value or safety of the item.
Time of Contract
The specific moment when a contract is considered to have been formed or agreed upon by all parties involved.
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