ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1C%5BC%40H%5D2CCCC3N2%5BC%40H%5D%28C1%29CCC3/file?format=sdf&get3d=True  -- CC1C%5BC%40H%5D2CCCC3N2%5BC%40H%5D%28C1%29CCC3 could not be loaded.