Research Article

Toxic Prediction of Pyrrolizidine Alkaloids and Structure-Dependent Induction of Apoptosis in HepaRG Cells

Figure 1

Chemical structures of the investigated PAs. Two classic structural types of PAs, which cover 4 different structures: retronecine type of twelve-membered cyclic diester (RTS), eleven-membered cyclic diester (MCT), noncyclic diester (RN), and platynecine-type (PLA).