ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1CCC%28NC1CCC%28C%29%28C%29O%29C2%3DCOC%3DC2/file?format=sdf&get3d=True  -- CC1CCC%28NC1CCC%28C%29%28C%29O%29C2%3DCOC%3DC2 could not be loaded.