ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29C%28%3DO%29NC1%3DCC%3DCC%28%3DC1%29C2CN3CCSC3%3DN2/file?format=sdf&get3d=True  -- CC%28C%29C%28%3DO%29NC1%3DCC%3DCC%28%3DC1%29C2CN3CCSC3%3DN2 could not be loaded.