ERROR opening https://cactus.nci.nih.gov/chemical/structure/n4ccccc4N3CCN%28CC3%29Cc2cc1cc%28F%29ccc1n2/file?format=sdf&get3d=True  -- n4ccccc4N3CCN%28CC3%29Cc2cc1cc%28F%29ccc1n2 could not be loaded.