ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC+%28%3DO%29+N+%28C1CCN+%28CCc2ccccc2%29+CC1%29+c1ccccc1/file?format=sdf&get3d=True -- CCC+%28%3DO%29+N+%28C1CCN+%28CCc2ccccc2%29+CC1%29+c1ccccc1 could not be loaded.