Lichen (usnea barbata) Extract Usnic Acid Powder
Organic Herb Inc What Is? Usnic acid is a naturally occurring dibenzofuran derivative found in several lichen species with the formula C18H16O7. It was first isolated by German scientist W. Knop in 1844[2] and first synthesized between 1933-1937 by Curd and Robertson.[3] Usnic acid was identified in many genera of lichens including Usnea, Cladonia, Hypotrachyna, … Leer más