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.
Isomeric equilibria possible for 2- (2HOPY) and 4-hydroxypyridines (4HOPY), and 2- (2HOPM) and 4-hydroxypyrimidines (4HOPM). The labile proton shown in bold red color. Tautomeric equilibria and rotation about C–OH indicated by ⇌ and ⇄ arrows, respectively.
