The Clemmensen reduction is a synthetic chemical reaction used to reduce a ketone or aldehyde to a corresponding alkane using amalgamated zinc and hydrochloric acid. However, there are various other methods of obtaining this reduction, which are known as synonyms for the Clemmensen reduction. These include the Wolff-Kishner reduction, which is achieved using hydrazine and a strong base, and the Meerwein-Ponndorf-Verley reduction, which utilizes aluminum isopropoxide and an alcohol solvent. Another synonym is the Barton-McCombie deoxygenation reaction, which uses tri-n-butyltin hydride to reduce a carbonyl compound to an alkane. These alternative methods may differ in terms of reagent and conditions required, but ultimately serve the same purpose as the Clemmensen reduction.