Figure 19.
A plausible biosynthetic pathway for 14. (A) Hypothetic pathway from 20 to 14. (B) Similar pathway might occur from 23 to 24 in Haeckeria spp.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.