Chaulmoogric acid
Chaulmoogric acid is a fatty acid found in chaulmoogra oil, the oil from the seeds of Hydnocarpus wightianus. It is an unusual fatty acid which has a cyclopentene ring at its terminus instead of being entirely linear like most fatty acids.
It is a white crystalline solid with a melting point of 68.5 °C. It is soluble in ether, chloroform, and ethyl acetate.
In the early 20th century, it was investigated as a possible treatment for leprosy due to the use in traditional medicine of chaulmoogra oil for leprosy.