ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1cc%28O%29c2C%28%3DO%29C%28O%29%3D%20C%28Oc2c1%29c3ccc%28O%29c%28O%29c3/file?format=sdf&get3d=True  -- Oc1cc%28O%29c2C%28%3DO%29C%28O%29%3D%20C%28Oc2c1%29c3ccc%28O%29c%28O%29c3 could not be loaded.