ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C20H40O2/c1-3-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20(21)22-4-2/h3-19H2,1-2H3/file?format=sdf&get3d=True  -- InChI=1S/C20H40O2/c1-3-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20(21)22-4-2/h3-19H2,1-2H3 could not be loaded.