4-((R)-8,8-Dimethyl-3,4-dihydro-2H,8H-benzo[1,2-b:4,3-b']dipyran-3-yl)-2-(3-methyl-but-2-enyl)-benzene-1,3-diol 68978-03-0 AIDS-096018 AIDS096018 Hispaglabridin A