ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1cc2c%28cc1%29%5BnH%5Dc%28c2CCN%29C/file?format=sdf&get3d=True  -- Oc1cc2c%28cc1%29%5BnH%5Dc%28c2CCN%29C could not be loaded.