<unk> is a proprietary blend containing cetylated and esterified fatty acids. The proposed mechanism of action is to improve the strength of cell membranes. It is marketed as a topical analgesic that exists in a cream formulation and is used for muscle and joint pains including osteoarthritis, strains, bruises, and sprains. The only confirmed active ingredient in this over-the-counter drug formulation is menthol.
Celadrin 
Angiozyme
Oprelvekin
Asfotase alfa
Velmanase alfa
Sulfatide
Dosulepin
Anistreplase