ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28C%29N%28C%29C%28%3DO%29c3cc1ccccc1c%28n3%29-c2ccccc2Cl/file?format=sdf&get3d=True -- CCC%28C%29N%28C%29C%28%3DO%29c3cc1ccccc1c%28n3%29-c2ccccc2Cl could not be loaded.