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.
(a-c) High performance liquid chromatography chromatograms of a stem bark b leaf c fruit polyphenols. Inset image belongs to respective mass spectra (i) fraction I positive mode [M+H]+, (ii) fraction I negative mode [M-H]−, (iii) fraction II positive mode [M+H]+, (iv) fraction II negative mode [M-H]−
