ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1ccccc1CNCCc2cc%28c%28cc2OC%29Cl%29OC/file?format=sdf&get3d=True  -- COc1ccccc1CNCCc2cc%28c%28cc2OC%29Cl%29OC could not be loaded.