ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%28C%29C%28c1ccccc1%29%28c2ccccc2%29CCNC%5CC%3DC/file?format=sdf&get3d=True  -- O%28C%29C%28c1ccccc1%29%28c2ccccc2%29CCNC%5CC%3DC could not be loaded.