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.
Chemical structures ofanticancer natural alkaloids: Berberine (1), evodiamine (2), matrine (3), piperine (4), piplartine (5), sanguinarine (6), tetrandrine (7), aporphine (8), harmine (9), harmaline (10), harmalacidine (11) and vasicinone (12).
