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.
Characterization of zerumbone isolated from Zingiber zerumbet. A, LC‐MS analysis of zerumbone. Zerumbone exhibited an M+ ion at 219.17. The inset shows the chemical structure of zerumbone [(2E,6E,10E)‐2,6,9,9‐tetramethylcycloundeca‐2,6,10‐trien‐1‐one]. B, 1H‐NMR spectrum of zerumbone (500 MHz, CDCl3)
