ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C18H26O4/c1-18(2)12-15(13-22-18)14-7-9-16(10-8-14)21-11-5-3-4-6-17(19)20/h7-10,15H,3-6,11-13H2,1-2H3,(H,19,20)/file?format=sdf&get3d=True  -- InChI=1S/C18H26O4/c1-18(2)12-15(13-22-18)14-7-9-16(10-8-14)21-11-5-3-4-6-17(19)20/h7-10,15H,3-6,11-13H2,1-2H3,(H,19,20) could not be loaded.