Figure 1.
Lead compound 1 and the building blocks defined as West (red), South (blue), East (green), and linker (pink).
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.