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Figure 2

Figure 2. Structures and nomenclature of compounds found in silymarin. From: Hepatoprotective and Antiviral Functions of Silymarin Components in HCV Infection.

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Stephen J. Polyak, et al. Hepatology. ;57(3):1262-1271.

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2.
Figure 1

Figure 1. Structural basics of silymarin. From: Hepatoprotective and Antiviral Functions of Silymarin Components in HCV Infection.

Left panel shows the basic structure of a flavonoid. The two benzene rings are designated A and B, while the 3 carbon chain forms ring C. The wavy line that links ring C to ring B indicates the many flavonoids are actually racemic mixtures because the carbon at position 2 on ring C (C2) can be chiral provided there is a single bond between C2 and C3. If there is a double bond between C2 and C3, the flavonoid is not chiral. Right panel shows how Taxifolin (a chiral flavonoid) and coniferyl alcohol condense to form silybin A. The blue color-coding shows how conferyl alcohol is incorporated into the larger flavonolignan molecule.

Stephen J. Polyak, et al. Hepatology. ;57(3):1262-1271.

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