1. The specimen Actephila excelsa (Dalz.) Muell.-Arg. was kindly provided and identified by UIC.
2. Bruceantin, a new potent antileukemic simaroubolide from Brucea antidysenterica
3. [α]D +11 (c 0.3, MeOH); IR (CHCl3) νmax 3420, 2980, 2930, 1730, 1610 cm−1; UV (PDA) λmax 227, 249, 286 nm; HRESIMS (M+H) 581.2169 (calculated for C35H33O8 581.2175)
4. [α]D −81 (c 0.4, MeOH); IR (CHCl3) νmax 3420, 2980, 2930, 1730, 1610 cm−1; UV (PDA) λmax 226, 249, 288 nm; HRESIMS (M+H) 581.2207 (calculated for C35H33O8 581.2175)
5. Structures of xuxuarines, stereoisomeric triterpene dimers from Maytenus chuchuhuasca