ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%20%28%3DO%29%20CC%20%28C%5C1%3DC%20%28/O%29%20c2ccccc2OC/1%3DO%29%20c3ccccc3/file?format=sdf&get3d=True -- CC%20%28%3DO%29%20CC%20%28C%5C1%3DC%20%28/O%29%20c2ccccc2OC/1%3DO%29%20c3ccccc3 could not be loaded.