ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN%28C%28C%29%3DO%29c1cccc%28-c2ccnc3c%28C%23N%29cnn23%29c1/file?format=sdf&get3d=True  -- CCN%28C%28C%29%3DO%29c1cccc%28-c2ccnc3c%28C%23N%29cnn23%29c1 could not be loaded.