ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1c%28CCNC%28C%29%3DO%29c2cc%28ccc2cc1%29OC/file?format=sdf&get3d=True  -- c1c%28CCNC%28C%29%3DO%29c2cc%28ccc2cc1%29OC could not be loaded.