ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BN%2B%5D%28C%29%28C%29CCc1c%5BnH%5Dc2c1c%28ccc2%29OP%28%3DO%29%28O%29%5BO-%5D/file?format=sdf&get3d=True  -- C%5BN%2B%5D%28C%29%28C%29CCc1c%5BnH%5Dc2c1c%28ccc2%29OP%28%3DO%29%28O%29%5BO-%5D could not be loaded.