ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CCCCC1CCN2C3%3DCC%3DCC%3DC3SC4%3DC2C%3DC%28C%3DC4%29SC/file?format=sdf&get3d=True  -- CN1CCCCC1CCN2C3%3DCC%3DCC%3DC3SC4%3DC2C%3DC%28C%3DC4%29SC could not be loaded.