ERROR opening https://cactus.nci.nih.gov/chemical/structure/%5BCl-%5D.Oc1ccc%28cc1OC%29c3%5Bo%2B%5Dc2cc%28O%29cc%28O%29c2cc3O/file?format=sdf&get3d=True  -- %5BCl-%5D.Oc1ccc%28cc1OC%29c3%5Bo%2B%5Dc2cc%28O%29cc%28O%29c2cc3O could not be loaded.