ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C8H8/c1-2-5-3(1)7-4(1)6(2)8(5)7/h1-8H/file?format=sdf&get3d=True  -- InChI=1S/C8H8/c1-2-5-3(1)7-4(1)6(2)8(5)7/h1-8H could not be loaded.