CHUMANEE, S.; THUNTA, J.; KHOOMSAB, R.; WINYAKUL, C. Optimizing ultrasound-assisted extraction for enhanced quantification of 7-hydroxymitragynine and mitragynine in kratom . Creative Science, [S. l.], v. 17, n. 1, p. 258707, 2024. DOI: 10.55674/cs.v17i1.258707. Disponível em: https://ph01.tci-thaijo.org/index.php/snru_journal/article/view/258707. Acesso em: 6 dec. 2025.