ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1ccc%28cc1%29CC3c2c%28cc%28O%29c%28O%29c2%29CCN3/file?format=sdf&get3d=True  -- Oc1ccc%28cc1%29CC3c2c%28cc%28O%29c%28O%29c2%29CCN3 could not be loaded.