ERROR opening https://cactus.nci.nih.gov/chemical/structure/c12c%28C%28C%3DCC1%3DO%29%3DO%29c%28ccc2%29O/file?format=sdf&get3d=True -- c12c%28C%28C%3DCC1%3DO%29%3DO%29c%28ccc2%29O could not be loaded.