ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BC%40%40H%5D1c2ccccc2CCN1C%28%3DO%29c3cc4ncc%28cn4n3%29Br/file?format=sdf&get3d=True  -- C%5BC%40%40H%5D1c2ccccc2CCN1C%28%3DO%29c3cc4ncc%28cn4n3%29Br could not be loaded.