ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%28C2%28c1ccccc1%29C3CCCC2CN%28C3%29C%29C/file?format=sdf&get3d=True  -- O%28C2%28c1ccccc1%29C3CCCC2CN%28C3%29C%29C could not be loaded.