ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C13H6/c1-3-5-7-9-11-13-12-10-8-6-4-2/h3H,1H2,2H3/file?format=sdf&get3d=True  -- InChI=1S/C13H6/c1-3-5-7-9-11-13-12-10-8-6-4-2/h3H,1H2,2H3 could not be loaded.