ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H14O4/c7-1-3-9-5-6-10-4-2-8/h7-8H,1-6H2/file?format=sdf&get3d=True  -- InChI=1S/C6H14O4/c7-1-3-9-5-6-10-4-2-8/h7-8H,1-6H2 could not be loaded.