Tonka bean oil Tonka bean oil Tonka bean oil is extracted from the seed of "Dipteryx odorata". The oil is composed primarily of coumarin, which is used to flavor tobacco. It is neither a pressed oil, nor an essential oil, but was traditionally obtained by soaking the large, single tonka bean seed in rum or other alcohol for 24 hours, after which crystals of coumarin appear on the outside of the seed, and are then collected. The seeds contain up to 46% oil by dry weight. In recent years, most commercially produced coumarin are synthetic, which has reduced the demand for tonka beans
Tonka Obretenova of Bulgaria, was established by her son Nikola Obretenov, in her house. Baba Tonka buried Stefan Karadzha, and managed to preserve his skull. Her sons Angel, Petar, Nikola, and Georgi () took part in different detachments and were killed, or sent into long exile. Her younger daughter, Anastasiya (Анастасия; also called: Siya, Сия) married Zahari Stoyanov — a revolutionary, writer and publicist. Baba Tonka Cove in Livingston Island in the South Shetland Islands, Antarctica is named after Tonka Obretenova. Tonka Obretenova Tonka Obretenova (), known as Baba Tonka (Баба Тонка), was a female Bulgarian revolutionary, born in 1812, probably in