ETHYL 5-(3-(2-ETHOXYCARBONYL-2-HYDROXY-4-OXO-CHROMAN-5-YL)OXY-2-HYDROXY-PROPOXY)-2-HYDROXY-4-OXO-CHROMANE-2-CARBOXYLATE
ethyl 5-(3-(2-ethoxycarbonyl-2-hydroxy-4-oxo-chroman-5-yl)oxy-2-hydroxy-propoxy)-2-hydroxy-4-oxo-chromane-2-carboxylate