ERROR opening https://cactus.nci.nih.gov/chemical/structure/N%23CC%28c6ccc%28N5c4c%28cnc3ccc%28c1cc2ccccc2nc1%29cc34%29N%28C5%3DO%29C%29cc6%29%28C%29C/file?format=sdf&get3d=True -- N%23CC%28c6ccc%28N5c4c%28cnc3ccc%28c1cc2ccccc2nc1%29cc34%29N%28C5%3DO%29C%29cc6%29%28C%29C could not be loaded.