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