ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OCC%29C%3DP%28c1ccccc1%29%28c2ccccc2%29c3ccccc3/file?format=sdf&get3d=True -- O%3DC%28OCC%29C%3DP%28c1ccccc1%29%28c2ccccc2%29c3ccccc3 could not be loaded.