Scheme 2.
Formation of 4-substituted 1,2,3-triazole-coumarin derivatives 8 and 9.
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.