SCHEME 1.
Molecular structures of the two pyrimidine derivatives (D1 and D2) and atomic numbering used to define the dihedral angles in the optimized geometries.
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.