ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C18H32O4/c1-2-3-11-14-17(22-21)15-12-9-7-5-4-6-8-10-13-16-18(19)20/h7,9,15,21H,2-6,8,10-14,16H2,1H3,(H,19,20)/b9-7-,17-15?/file?format=sdf&get3d=True  -- InChI=1S/C18H32O4/c1-2-3-11-14-17(22-21)15-12-9-7-5-4-6-8-10-13-16-18(19)20/h7,9,15,21H,2-6,8,10-14,16H2,1H3,(H,19,20)/b9-7-,17-15? could not be loaded.