Vanilla pulp used in papermaking, in which the lignin is broken down using sulfites or sulfates. However, vanillin is only one of 171 identified aromatic components of real vanilla fruits. The orchid species "Leptotes bicolor" is used as a natural vanilla replacement in Paraguay and southern Brazil. In 1996 the US Food and Drug Administration cautioned that some vanilla products sold in Mexico were made from the cheaper tonka bean which as well as vanillin also contains the toxin coumarin. They advised consumers to always check the ingredients label and avoid suspicously cheap products. In the United States, castoreum, the exudate
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