ERROR opening https://cactus.nci.nih.gov/chemical/structure/COC1%3DCC%28%3DCC%28%3DC1%29%5CC%3DC%5CC2%3DCC%3DC%28C%3DC2%29O%29OC/file?format=sdf&get3d=True -- COC1%3DCC%28%3DCC%28%3DC1%29%5CC%3DC%5CC2%3DCC%3DC%28C%3DC2%29O%29OC could not be loaded.