ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC2c3ccc%28O%29cc3OC%28C2O%29c%28cc1O%29ccc1O/file?format=sdf&get3d=True  -- OC2c3ccc%28O%29cc3OC%28C2O%29c%28cc1O%29ccc1O could not be loaded.