Diverse Novel Steroids

Since 1999, only 17 new skeleton steroids, assigned to 3 families 4 genera, have been isolated and identified from plants (1244‒1260 Fig. 12.1; Table A11). Their architectures are characterized by containing the basic constructure cyclopentane polyhydrophenanthrene. Solanaceae produce a rich variety of novel steroids. This chapter will focus on the names, classes, structure characteristics, the types of compounds, and plant sources of these new skeleton sterides.