ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C21H29NO/c23-21(19-7-3-1-4-8-19,
11-14-22-12-5-2-6-13-22)20-16-17-9-10-18(20)15-17/h1,3-4,7-10,17-18,20,
23H,2,5-6,11-16H2/file?format=sdf&get3d=True  -- InChI=1S/C21H29NO/c23-21(19-7-3-1-4-8-19,
11-14-22-12-5-2-6-13-22)20-16-17-9-10-18(20)15-17/h1,3-4,7-10,17-18,20,
23H,2,5-6,11-16H2 could not be loaded.