ERROR opening https://cactus.nci.nih.gov/chemical/structure/Cc1c2ccnc%28c2cc3c1%5BnH%5Dc4c3cccc4%29C/file?format=sdf&get3d=True -- Cc1c2ccnc%28c2cc3c1%5BnH%5Dc4c3cccc4%29C could not be loaded.