ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DCC%3DC2C%28C%3DCC3%3DCC%3DCC%3DC23%29%3DC1/file?format=sdf&get3d=True  -- C1%3DCC%3DC2C%28C%3DCC3%3DCC%3DCC%3DC23%29%3DC1 could not be loaded.