ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN4C1CCC4CC%28C1%29OC%28c2ccccc2%29c3ccccc3/file?format=sdf&get3d=True  -- CCN4C1CCC4CC%28C1%29OC%28c2ccccc2%29c3ccccc3 could not be loaded.