Scheme 1.
Synthesis of the acetylenic 3–4 and triazole derivatives of betulin 5a–k and 6a–h.
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.