PRELIMINARY PHYTOCHEMICAL INVESTIGATION AND THIN LAYER CHROMATOGRAPHY OF RHEUM EMODI. International Research Journal of Pharmacy, [S. l.], v. 3, n. 4, p. 158–159, 2012. Disponível em: https://irjponline.org/index.php/irjp/article/view/2197. Acesso em: 15 jul. 2026.