ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCC%28%3DO%29N%28C1CCN%28CC1%29CCc2ccccc2%29c3ccc%28OC%29cc3/file?format=sdf&get3d=True  -- CCCC%28%3DO%29N%28C1CCN%28CC1%29CCc2ccccc2%29c3ccc%28OC%29cc3 could not be loaded.