Scheme 2. Synthesis of 3-Benzylidenechroman-4-ones Having the 5-Hydroxy-7,8-dimethoxy Group.
The gray box is the reported natural product and in all other schemes.
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.