ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H12O3/c1-4-7-5(2)9-6(3)8-4/h4-6H,1-3H3/file?format=sdf&get3d=True  -- InChI=1S/C6H12O3/c1-4-7-5(2)9-6(3)8-4/h4-6H,1-3H3 could not be loaded.