ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C2H2F4/c3-1-2(4,5)6/h1H2/file?format=sdf&get3d=True -- InChI=1S/C2H2F4/c3-1-2(4,5)6/h1H2 could not be loaded.