Figure 4

Off-line ESI-MS of crude extract from the stem bark (A) and leaves (B) of Aspidosperma olivaceum . The ion at m/z 371 [M + H]⁺ corresponded to aspidoscarpine (1), the ion at m/z 267 [M + H]⁺ corresponded to uleine (2), the ion at m/z 265 [M + H]⁺ corresponded to apparicine (3), the ion at m/z 326 [M + H]⁺ corresponded to demethoxy-aspidospermine (4), and the ion at m/z 265 [M + H]⁺ in the crude leaf extract corresponded to N-methyl-tetrahydrolivacine (5).