Figure 2

The proposed fragmentation behaviours of benzyltetrahydroisoquinoline and aporphine (a), ipecac (b), chelidonine (c), and bisbenzyltetrahydroisoquinoline (d).

The proposed fragmentation behaviours of benzyltetrahydroisoquinoline and aporphine (a), ipecac (b), chelidonine (c), and bisbenzyltetrahydroisoquinoline (d).