ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1C%3D2C%28O%29%3DCC%28O%29%3DCC2OC%28C%3D3C%3DCC%3DCC3%29C1/file?format=sdf&get3d=True -- O%3DC1C%3D2C%28O%29%3DCC%28O%29%3DCC2OC%28C%3D3C%3DCC%3DCC3%29C1 could not be loaded.