Excelxylin A: a new seco A-ring tirucallane triterpenoid from the stem bark of Dysoxylum excelsum. - Kautsari A; Naini AA; Mayanti T; Nurlelasari; Harneti D; Farabi K; Maharani R; Harizon; Azmi MN; Supratman U (Journal of Asian natural products research, 2024)