ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29%28C%3DC%29c1cc%28c%28cc1O%29OC%29/C%3DC/C%28%3DO%29c2ccc%28cc2%29O/file?format=sdf&get3d=True -- CC%28C%29%28C%3DC%29c1cc%28c%28cc1O%29OC%29/C%3DC/C%28%3DO%29c2ccc%28cc2%29O could not be loaded.