Fig. 1 in Free radical scavenging potency of ellagic acid and its derivatives in multiple H /e processes

Fig. 1. The most stable optimized geometries of the ellagic acid (1) and its derivatives. The derivatives include 3-O-methylellagic acid (2), 3,3′-di-O-methylellagic acid (3), 3,3′,4′-tri-O-methylellagic acid (4) and 2,3,7-trihydroxychromeno [5,4,3-cde]chromene-5,10-dione (5). Intramolecular hydrogen-bonds are identified by the dash lines and the corresponding bond lengths are labeled beside the hydrogen-bond.