ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1c3ccccc3%5CC%28%3DN/N1CCN%28C%29C%29Cc2ccccc2/file?format=sdf&get3d=True  -- O%3DC1c3ccccc3%5CC%28%3DN/N1CCN%28C%29C%29Cc2ccccc2 could not be loaded.