ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1ccc%28cc1O%29C%28O%29C%28NC%28C%29C%29CC/file?format=sdf&get3d=True  -- Oc1ccc%28cc1O%29C%28O%29C%28NC%28C%29C%29CC could not be loaded.