ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc3cc1CCN2CC%3DC4C%3DCC%28O%29CC24c1cc3OC/file?format=sdf&get3d=True -- COc3cc1CCN2CC%3DC4C%3DCC%28O%29CC24c1cc3OC could not be loaded.