LC-MS analysis revealed eight individual silymarin components: silybin A, silybin B, isosilybin A, isosilybin B, silydianin, silychristin, an unknown flavonolignan (structural isomer with m/z 483.129) and 2,3-dehydrosilybin (m/z 481.112). Interestingly, no taxifolin was detected in this fraction. A list of identified silymarin components and their relative abundances is provided in Table and their molecular structures are illustrated in Figure . The most abundant constituent was silybin B, comprising 33.4% based on the integral of molecular ion, followed by silybin A (19.4%) and silydianin (19.2%).