ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc3ccc%28cc3%29C2CC%28C1C%28%3DO%29N2C%29ON%3DC1c4ccncc4/file?format=sdf&get3d=True  -- COc3ccc%28cc3%29C2CC%28C1C%28%3DO%29N2C%29ON%3DC1c4ccncc4 could not be loaded.