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Figure 3 . Molecular structure of (I) (top) in comparison with the parent compound glycyrrhetinic acid (bottom) in its DMSO solvate (Beseda et al., 2010). Hydrogen atoms omitted for clarity, ring designation in large italics (only for bottom molecule), configuration of the asymmetric carbon atoms green (I), blue arrows indicate the C=C double bonds. Atom numeration in (I) follows a widely accepted designation in glycyrrhetinic acid. |