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.
A; Orbital analysis of celastrol (1) clearly shows the LUMO (red) positioned on the β-face. The nitronate anion HOMO (blue) attacks at the upper face. Blue - highest electron density; red – lowest electron density. B; Density functional theory (DFT) minimized structures of 4β and 4α.
