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.
Case 3. Reaction nodes are represented by squares, whereas substance nodes, by circles. Color code of the substance nodes: green, target molecule; yellow, starting material; magenta outline, undesirable substance; white, intermediate. All undesirable substances are starting materials.
