ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCNC%28%3DN%29N%5CN%3DC%5Cc2cnc1ccc%28cc12%29OC/file?format=sdf&get3d=True  -- CCCCCNC%28%3DN%29N%5CN%3DC%5Cc2cnc1ccc%28cc12%29OC could not be loaded.