ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H23NO2/c1-12(2)17-10-14(18)11-19-16-9-5-7-13-6-3-4-8-15(13)16/h4-5,7-9,12,14,17-18H,3,6,10-11H2,1-2H3/file?format=sdf&get3d=True  -- InChI=1S/C16H23NO2/c1-12(2)17-10-14(18)11-19-16-9-5-7-13-6-3-4-8-15(13)16/h4-5,7-9,12,14,17-18H,3,6,10-11H2,1-2H3 could not be loaded.