ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C18H38O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-17-20-18-16-19/h19H,2-18H2,1H3/file?format=sdf&get3d=True -- InChI=1S/C18H38O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-17-20-18-16-19/h19H,2-18H2,1H3 could not be loaded.