ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1cc2c%28cc1O%29c%28c%5BnH%5D2%29CCNC%28%3DO%29C3CCCNC3%3DO/file?format=sdf&get3d=True  -- c1cc2c%28cc1O%29c%28c%5BnH%5D2%29CCNC%28%3DO%29C3CCCNC3%3DO could not be loaded.