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.
Structures of quinine (1), progesterone (2), penicillin (3), prostaglandin F2α (4), and cobyric acid (5), natural products whose total synthesis inspired and resulted in the development of manifold advances in chemistry, biology, and medicine.
