ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H2F6/c5-3(6,7)1-2-4(8,9)10/h1-2H/b2-1 /file?format=sdf&get3d=True  -- InChI=1S/C4H2F6/c5-3(6,7)1-2-4(8,9)10/h1-2H/b2-1  could not be loaded.