Beltrame FL, Filho ER, Barros FA, Cortez DA, Cass QB. A validated higher-performance liquid chromatography method for quantification of cinchonain Ib in bark and phytopharmaceuticals of Trichilia catigua used as Catuaba. J Chromatogr A. 2006 Jun 30;1119(1-2):257–63. doi: 10.1016/j.chroma.2005.10.050. PMID: 16360665.
A validated higher-performance liquid chromatography method for quantification of cinchonain Ib in bark and phytopharmaceuticals of Trichilia catigua used as Catuaba