ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%28C%28C1%28C%29C%29C%28%3DO%29c2cn%28c3c2cccc3%29CCCCCF%29C/file?format=sdf&get3d=True -- CC1%28C%28C1%28C%29C%29C%28%3DO%29c2cn%28c3c2cccc3%29CCCCCF%29C could not be loaded.