ERROR opening https://cactus.nci.nih.gov/chemical/structure/Clc2cc1c%28cc2%29nc%28C%29c1C%3D3CCNCC%3D3/file?format=sdf&get3d=True  -- Clc2cc1c%28cc2%29nc%28C%29c1C%3D3CCNCC%3D3 could not be loaded.