· Cloxotestosterone (CAS
· Ethisterone (Ethynyl testosterone, CAS RN: 434-03-7)
· Mestanolone (CAS RN: 521-11-9)
· 17alpha-Methyltestosterone (CAS RN: 58-18-4)
· Norethindrone (CAS RN: 68-22-4)
· Normethisterone (CAS RN: 514-61-4)
· Oxymetholone (CAS RN: 434-07-1)
· Silandrone (Testosterone trimethylsilyl ether, CAS RN: 5055-42-5)
· Testosterone Acetate (CAS RN: 1045-69-8)
· Testosterone Phenylpropionate (CAS RN: 1255-49-8)
· Testosterone Benzoate (CAS RN: 2088-71-3)
· Testosterone heptanoate (CAS RN: 315-37-7)
· Testosterone phenylacetate (CAS RN: 5704-03-0)
· Testosterone propionate (CAS RN: 57-85-2)
· Testosterone cypionate (CAS RN: 58-20-8)
· Testosterone ketolaurate (CAS RN: 5874-98-6)
· Testosterone Undecanoate
· Testosterone Glucuronide
· Testosterone Hemisuccinate
Alkylated testosterone at 17-alpha position such as methyltestosterone show more pharmacologic activity than testosterone itself. Methyltestosterone, a synthetic androgen, is used to treat testosterone deficiency in males. For females it is used in the relief of postpartum breast pain and swelling after pregnancy. It is used to treat the symptom of menopause and in the palliation of certain inoperable breast cancers. Methyltestosterone is a white to creamy white crystalline powder; melting point 162 - 167 C; practically insoluble in water; soluble in various organic solvents; administered orally or sublingually. The chemical designation is 17beta-hydroxy-17alpha-methyl-4-androsten-3-one.
As for aldehydes , the hydrogen atoms on the carbon adjacent ("α to") the carboxyl group in esters are sufficiently acidic to undergo deprotonation, which in turn leads to a variety of useful reactions. Deprotonation requires relatively strong bases, such as alkoxides . Deprotonation gives a nucleophilic enolate , which can further react, ., the Claisen condensation and its intramolecular equivalent, the Dieckmann condensation . This conversion is exploited in the malonic ester synthesis , wherein the diester of malonic acid reacts with an electrophile (., alkyl halide ), and is subsequently decarboxylated. Another variation is the Fráter–Seebach alkylation .
Excess carbohydrates in the body are converted to palmitic acid. Palmitic acid is the first fatty acid produced during fatty acid synthesis and is the precursor to longer fatty acids. As a consequence, palmitic acid is a major body component of animals. In humans, one analysis found it to make up 21–30% (molar) of human depot fat ,  and it is a major, but highly variable, lipid component of human breast milk.  Palmitate negatively feeds back on acetyl-CoA carboxylase (ACC), which is responsible for converting acetyl-CoA to malonyl-CoA, which in turn is used to add to the growing acyl chain, thus preventing further palmitate generation.  In biology, some proteins are modified by the addition of a palmitoyl group in a process known as palmitoylation . Palmitoylation is important for membrane localisation of many proteins.