ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29O%5BC%40H%5D1Cc2ccccc2N%28C%28N%29%3DO%29c2ccccc21/file?format=sdf&get3d=True  -- CC%28%3DO%29O%5BC%40H%5D1Cc2ccccc2N%28C%28N%29%3DO%29c2ccccc21 could not be loaded.