ERROR opening https://cactus.nci.nih.gov/chemical/structure/FC%20%28F%29%20%28F%29%20c1ccc%20%28cc1%29%20c2ccccc2C%20%28%3DO%29%20Nc3cc4c%20%28cc3%29%20n%20%28c%20%28c4%29%20C%20%28%3DO%29%20N%5BC%40%40H%5D%28c5ccccc5%29%20C%20%28%3DO%29%20N%20%28Cc6ccccc6%29%20C%29%20C/file?format=sdf&get3d=True  -- FC%20%28F%29%20%28F%29%20c1ccc%20%28cc1%29%20c2ccccc2C%20%28%3DO%29%20Nc3cc4c%20%28cc3%29%20n%20%28c%20%28c4%29%20C%20%28%3DO%29%20N%5BC%40%40H%5D%28c5ccccc5%29%20C%20%28%3DO%29%20N%20%28Cc6ccccc6%29%20C%29%20C could not be loaded.