ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H20O8/c1-23-11-7-6-10(8-12(11)24-2)18-20(27-5)17(22)15-13(28-18)9-14(25-3)19(26-4)16(15)21/h6-9,21H,1-5H3/file?format=sdf&get3d=True  -- InChI=1S/C20H20O8/c1-23-11-7-6-10(8-12(11)24-2)18-20(27-5)17(22)15-13(28-18)9-14(25-3)19(26-4)16(15)21/h6-9,21H,1-5H3 could not be loaded.