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.
Structural formulas and molecular models of echinatin and licochalcone A: A, structural formula of echinatin; B, structural formula of licochalcone A; C, preferential conformation-based molecular model of echinatin; and D, preferential conformation-based molecular model of licochalcone A. The molecular models were created based on molecular mechanics calculations using Chem3D Pro 14.0. (red, O; gray, C; white, H).
