ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C6H8O3/c1-3-5(7)6(8)4(2)9-3/h3,8H,1-2H3/file?format=sdf&get3d=True  -- InChI=1/C6H8O3/c1-3-5(7)6(8)4(2)9-3/h3,8H,1-2H3 could not be loaded.