Fig. 1. Chemical structures of naltrexone, IT1t, designed bivalent (1), and monovalent controls (2 and 3).
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.