Figure 2
From: Hyperisampsins H–M, Cytotoxic Polycyclic Polyprenylated Acylphloroglucinols from Hypericum sampsonii
(a) Selected 2D NMR correlations for the core structures of 1–6; (b) Newman projections for C-24/C-23 of 1–6; (c) key NOESY correlations for the 1,2-dioxane ring of 3.
