ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC%28c1ccc%28O%29cc1%29CNC%28C%29CCc2ccc%28O%29cc2/file?format=sdf&get3d=True  -- OC%28c1ccc%28O%29cc1%29CNC%28C%29CCc2ccc%28O%29cc2 could not be loaded.