Rearranged oleanane type saponins, astraisoolesaponins A1–A3 and B, from the stems of Astragalus membranaceus (Fisch.) Bge. var. mongholicus (Bge.) Hsiao. - Zhang, Yi; Guo, Yuan-Qiang; Li, Xiao-Xia; Ruan, Jing-Ya; Wang, Ting-Ting; Li, Jian; Han, Li-Feng; Yu, Hai-Yang; Wang, Tao (Tetrahedron, 2016)