ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H27NO4/c1-4-17(5-2)10-11-20-12-14(18)13-21-16-9-7-6-8-15(16)19-3/h6-9,14,18H,4-5,10-13H2,1-3H3/file?format=sdf&get3d=True  -- InChI=1S/C16H27NO4/c1-4-17(5-2)10-11-20-12-14(18)13-21-16-9-7-6-8-15(16)19-3/h6-9,14,18H,4-5,10-13H2,1-3H3 could not be loaded.