ERROR opening https://cactus.nci.nih.gov/chemical/structure/N%23Cc3ccc%28cc3%29CNC%28%3DO%29CCCCCN%28CC2%29CCN2c1ccccc1-c4ccccc4/file?format=sdf&get3d=True  -- N%23Cc3ccc%28cc3%29CNC%28%3DO%29CCCCCN%28CC2%29CCN2c1ccccc1-c4ccccc4 could not be loaded.