ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%28%5BC%40%40%5D1%28CCc2c%28O1%29c%28c%28c%28c2%29O%29C%29C%29C%29CC%5BC%40H%5D%28C%29CCC%5BC%40H%5D%28C%29CCCC%28C%29C/file?format=sdf&get3d=True -- C%28%5BC%40%40%5D1%28CCc2c%28O1%29c%28c%28c%28c2%29O%29C%29C%29C%29CC%5BC%40H%5D%28C%29CCC%5BC%40H%5D%28C%29CCCC%28C%29C could not be loaded.