ERROR opening https://cactus.nci.nih.gov/chemical/structure/N%23CN%5CC%28%3DN/C%29NCCSCc1nc%5BnH%5Dc1C/file?format=sdf&get3d=True  -- N%23CN%5CC%28%3DN/C%29NCCSCc1nc%5BnH%5Dc1C could not be loaded.