“…Betulin (3-lup-20(29)-ene-3β,28diol), structurally belonging to pentacyclic lupane triterpenoids [10], inhibited xanthine oxidase significantly [11,12] and is a major compound of Alstonia scholaris. Previous studies of A. scholaris reported some structurally diverse and bioactive alkaloids [13][14][15][16][17][18][19][20] and triterpenoids [21][22][23][24], and then, reducing the UA levels in lupanes, structurally related to betulin, encouraged our further investigation into it. As a result, 12 lupanes, including three new compounds named alstoscholarilups A−C (1-3) and nine known analogues (4-12), were isolated from Alstonia scholaris (L.) R. Br.…”