ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28%3DO%29N%28c1ccccc1%29C2CCN%28CC2C%29CC%28O%29c3ccccc3/file?format=sdf&get3d=True -- CCC%28%3DO%29N%28c1ccccc1%29C2CCN%28CC2C%29CC%28O%29c3ccccc3 could not be loaded.