ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%3DCC%28%3DO%29N%28c2ccccc2%29C1CCN%28CC1%29CCc3ccccc3/file?format=sdf&get3d=True  -- C%3DCC%28%3DO%29N%28c2ccccc2%29C1CCN%28CC1%29CCc3ccccc3 could not be loaded.