ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C18H34O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19/h2,18H,1,3-17H2/file?format=sdf&get3d=True  -- InChI=1S/C18H34O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19/h2,18H,1,3-17H2 could not be loaded.