ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1ccc%28cc1%29N%2C%20COC1%3DCC%3DC%28C%3DC1%29N/file?format=sdf&get3d=True  -- COc1ccc%28cc1%29N%2C%20COC1%3DCC%3DC%28C%3DC1%29N could not be loaded.