(1) for 13 C) (Figures 3, S19, S20). However, for the presumed correct structure 1, discrepancies were observed between the experimental and calculated C NMR chemical shifts of the HHDP moiety (ΔδC: -5.5 and -5.7 ppm for C-1 and C-1′ in the HHDP moiety, respectively, for the αanomer) (Table ). In the lowest-energy conformer of 1 (1A), each of the two galloyl units in the HHDP moiety orients its three hydroxy groups inward (A-type conformers) (Figure ).