ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29%28C%3DC%29C12CC%28C%28%3DO%29N%5C3C1%28NC%28%3DO%29/C3%3DC%5CC4%3DCN%3DCN4%29N%28C5%3DCC%3DCC%3DC25%29OC%29O/file?format=sdf&get3d=True -- CC%28C%29%28C%3DC%29C12CC%28C%28%3DO%29N%5C3C1%28NC%28%3DO%29/C3%3DC%5CC4%3DCN%3DCN4%29N%28C5%3DCC%3DCC%3DC25%29OC%29O could not be loaded.