ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1ccc%28cc1%29C2Cc3cccc%28O%29c3C%28%3DO%29O2/file?format=sdf&get3d=True  -- Oc1ccc%28cc1%29C2Cc3cccc%28O%29c3C%28%3DO%29O2 could not be loaded.