ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCN%28CCC%29C%28%3DO%29C%28Cc1ccc%28cc1%29OCCN%28CC%29CC%29NC%28%3DO%29c2ccccc2/file?format=sdf&get3d=True -- CCCN%28CCC%29C%28%3DO%29C%28Cc1ccc%28cc1%29OCCN%28CC%29CC%29NC%28%3DO%29c2ccccc2 could not be loaded.