ERROR opening https://cactus.nci.nih.gov/chemical/structure/S%3DP13SP%28%3DS%29%28S1%29c4c2c%28cccc23%29ccc4/file?format=sdf&get3d=True  -- S%3DP13SP%28%3DS%29%28S1%29c4c2c%28cccc23%29ccc4 could not be loaded.