ERROR opening https://cactus.nci.nih.gov/chemical/structure/Clc1ccc+%28cc1%29C%28c2ncccc2%29CCN%28C%29C/file?format=sdf&get3d=True -- Clc1ccc+%28cc1%29C%28c2ncccc2%29CCN%28C%29C could not be loaded.