ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1cc2c%28c%28O%29c1%29%5BnH%5Dcc2CCN/file?format=sdf&get3d=True  -- Oc1cc2c%28c%28O%29c1%29%5BnH%5Dcc2CCN could not be loaded.