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 and product ion mass spectra of target compounds. The positions marked with colored circles indicated differences in the structure of the three compounds. (A) Artemisinin, (B) deoxyartemisinin, (C) 10-deoxoartemisinin, and (D) terfenadine.
