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.
Chromatograms of bark extracts from larch, birch and beech trees. Different substances of DHBA (dihydroxybenzoic acid), HBA (hydroxybenzoic acid), F (unknown flavonoids), V (Vanillin), C (catechin), EA (ellagic acid), FA (ferulic acid), VA (vanillin acid) and GA (gallic acid) were determined.
