ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28C%29Oc1cc%28C%29cc%28OC2%28C%29C%29c1C%28C3%29%3DC2CCC3C/file?format=sdf&get3d=True -- O%3DC%28C%29Oc1cc%28C%29cc%28OC2%28C%29C%29c1C%28C3%29%3DC2CCC3C could not be loaded.