ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC2%28c1cc%28O%29ccc1%29CCCCC2CN%28C%29C/file?format=sdf&get3d=True  -- OC2%28c1cc%28O%29ccc1%29CCCCC2CN%28C%29C could not be loaded.