ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BB-%5D%28F%29%28F%29%28F%29F.%5BN%2B%5D%28%3DO%29%3DO/file?format=sdf&get3d=True  -- %5BB-%5D%28F%29%28F%29%28F%29F.%5BN%2B%5D%28%3DO%29%3DO could not be loaded.