ERROR opening https://cactus.nci.nih.gov/chemical/structure/Clc4cc2c%28C%28/c1ncccc1CC2%29%3DC3/CCNCC3%29cc4/file?format=sdf&get3d=True  -- Clc4cc2c%28C%28/c1ncccc1CC2%29%3DC3/CCNCC3%29cc4 could not be loaded.