Glabridin

In the title compound, C₂₀H₂₀O₄ {systematic name: 4-[(3R)-8,8-dimethyl-3,4-dihydro-2H-pyrano[2,3-f]chromen-3-yl]benz­ene-1,3-diol}, the hydro­pyran ring linked to the pendant benzene ring adopts an envelope conformation, with the methyne C atom forming the flap. In the crystal, the –OH group at the 3-position of the benzene ring forms an O—H...O hydrogen bond to a chromene O-atom acceptor, whereas the –OH group at the 1-position forms an O—H...π inter­action with a neighboring benzene ring. The O—H...O hydrogen bonds form [001] chains and the O—H...π bonds cross-link the chains into (101) sheets. The absolute structure was assumed to be the same as that deduced from previous studies for the natural product.