InChI=1/C20H20O7/c21-19-11-23-17(13-7-3-1-4-8-13)25-15(19)16-20(22,27-19)12-24-18(26-16)14-9-5-2-6-10-14/h1-10,15-18,21-22H,11-12H2/t15-,16-,17-,18-,19-,20-/m0/s1 297F2A1232EEC024