ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C18H16O8/c1-23-11-5-4-8(6-9(11)19)12-7-10(20)13-14(21)17(24-2)15(22)18(25-3)16(13)26-12/h4-7,19,21-22H,1-3H3/file?format=sdf&get3d=True  -- InChI=1S/C18H16O8/c1-23-11-5-4-8(6-9(11)19)12-7-10(20)13-14(21)17(24-2)15(22)18(25-3)16(13)26-12/h4-7,19,21-22H,1-3H3 could not be loaded.