ERROR opening https://cactus.nci.nih.gov/chemical/structure/NCCc1c%5BnH%5Dc2cccc%28OP%28%3DO%29%28O%29O%29c12/file?format=sdf&get3d=True  -- NCCc1c%5BnH%5Dc2cccc%28OP%28%3DO%29%28O%29O%29c12 could not be loaded.