ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DCN%3DC%28C%3DC1%29%5BC%40H%5D2C%5BC%40%40H%5D2COC3%3DNC%28%3DNC%28%3DC3%29NCC4%3DNN%3DC%28S4%29C%29C/file?format=sdf&get3d=True -- CC1%3DCN%3DC%28C%3DC1%29%5BC%40H%5D2C%5BC%40%40H%5D2COC3%3DNC%28%3DNC%28%3DC3%29NCC4%3DNN%3DC%28S4%29C%29C could not be loaded.