FIGURE 4.

Relative lignan contents in different tissues of P. hexandrum and P. peltatum. Lignans identified included (−)-podophyllotoxin (1b), (−)-α-peltatin (20b), (−)-β-peltatin (27b), podophyllotoxin-glucoside (41), α-peltatin-glucoside (42), β-peltatin-glucoside (43), and 4′-demethylpodophyllotoxin (16) in both P. hexandrum (A) and P. peltatum (B) tissues. The individual lignan amounts are presented as relative peak areas (280 nm) with each given compound having a relative peak area of 100% for the most abundant amount, and the others are reported as a percentage of that value.