ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc2c%28c1%29cccc2C%28%3DO%29c3c4ccccc4n%28n3%29CCCCCF/file?format=sdf&get3d=True -- c1ccc2c%28c1%29cccc2C%28%3DO%29c3c4ccccc4n%28n3%29CCCCCF could not be loaded.