Separation of Flavonoids and Naphthopyrones from four Brazilian Paepalanthus Species by Dropfet Countercurrent Chromatography. Rev Bras Plantas Med [Internet]. 1999 Sep. 24 [cited 2025 Sep. 26];2(1):43-7. Available from: https://rbpm.emnuvens.com.br/revista/article/view/279