ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1CCC%28C2C13C2C%28CC3%29%28C%29O%29C%28C%29C/file?format=sdf&get3d=True  -- CC1CCC%28C2C13C2C%28CC3%29%28C%29O%29C%28C%29C could not be loaded.