ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1%5BC%40%5D2%28C%28C%3D3C%3D4C%28C2%29%3DCNC4C%3DCC3%29%3DC%5BC%40%40H%5D%28C%28N%28CC%29CC%29%3DO%29C1%29%5BH%5D.%5BC%40H%5D%28%5BC%40%40H%5D%28C%28O%29%3DO%29O%29%28C%28O%29%3DO%29O/file?format=sdf&get3d=True -- CN1%5BC%40%5D2%28C%28C%3D3C%3D4C%28C2%29%3DCNC4C%3DCC3%29%3DC%5BC%40%40H%5D%28C%28N%28CC%29CC%29%3DO%29C1%29%5BH%5D.%5BC%40H%5D%28%5BC%40%40H%5D%28C%28O%29%3DO%29O%29%28C%28O%29%3DO%29O could not be loaded.