ERROR opening https://cactus.nci.nih.gov/chemical/structure/c3ccccc3N%28C%28%3DO%29COC%29C1CCN%28CC1%29CCc2ccccc2/file?format=sdf&get3d=True  -- c3ccccc3N%28C%28%3DO%29COC%29C1CCN%28CC1%29CCc2ccccc2 could not be loaded.