ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3Dc1%5BnH%5Dc2ccccc2c%28%3DO%29n1CCNCc3ccccc3OC/file?format=sdf&get3d=True  -- O%3Dc1%5BnH%5Dc2ccccc2c%28%3DO%29n1CCNCc3ccccc3OC could not be loaded.