ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1cccc3c1CCC%28N%28CCC%29CCc2sccc2%29C3/file?format=sdf&get3d=True  -- Oc1cccc3c1CCC%28N%28CCC%29CCc2sccc2%29C3 could not be loaded.