ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28C%29CCc1c%5BnH%5Dc3ccc2OCCCc2c13/file?format=sdf&get3d=True  -- CN%28C%29CCc1c%5BnH%5Dc3ccc2OCCCc2c13 could not be loaded.