Fig. 2.
A heterocycle forming reaction from US patent number US20030149264A1. The reaction core consists of all numbered atoms 1, 2, 3, 4, 5
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.