ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28%3DO%29N%28C1CCN%28CCc2ccccc2%29CC1C%29c1ccccc1/file?format=sdf&get3d=True  -- CCC%28%3DO%29N%28C1CCN%28CCc2ccccc2%29CC1C%29c1ccccc1 could not be loaded.