ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C7H8/c1-2-4-5(2)7-3(1)6(4)7/h2-7H,1H2/file?format=sdf&get3d=True  -- InChI=1S/C7H8/c1-2-4-5(2)7-3(1)6(4)7/h2-7H,1H2 could not be loaded.