ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C15H20O/c16-15-13(11-5-1-2-6-11)9-10-14(15)12-7-3-4-8-12/h1-10H2/file?format=sdf&get3d=True  -- InChI=1S/C15H20O/c16-15-13(11-5-1-2-6-11)9-10-14(15)12-7-3-4-8-12/h1-10H2 could not be loaded.