ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C8H12/c1-3-5-7-8-6-4-2/h3,5-8H,1,4H2,2H3/b7-5 ,8-6 /file?format=sdf&get3d=True  -- InChI=1S/C8H12/c1-3-5-7-8-6-4-2/h3,5-8H,1,4H2,2H3/b7-5 ,8-6  could not be loaded.