ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DS%28%3DO%29%28O%29CC12C%28%3DO%29CC%28CC1%29C2%28C%29C/file?format=sdf&get3d=True -- O%3DS%28%3DO%29%28O%29CC12C%28%3DO%29CC%28CC1%29C2%28C%29C could not be loaded.