ERROR opening https://cactus.nci.nih.gov/chemical/structure/Clc1ccc2Nc4ccccc4C%28%3DN%5Cc2c1%29/N3CCNCC3/file?format=sdf&get3d=True  -- Clc1ccc2Nc4ccccc4C%28%3DN%5Cc2c1%29/N3CCNCC3 could not be loaded.