Skip to main content
. 2021 Apr 19;11(4):603. doi: 10.3390/biom11040603

Figure 3.

Figure 3

Figure 3

Figure 3

Figure 3

Podophyllotoxin derivatives produced by selective cleavage of ring A through Schreier’s method and the modified-Schreier method. These ring-A-open compounds, however, appeared biologically less active than podophyllotoxin itself.