ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1ccc2ncc%28c2c1%29c3cnc%28nc3%29c5cnc4ccc%28O%29cc45/file?format=sdf&get3d=True  -- Oc1ccc2ncc%28c2c1%29c3cnc%28nc3%29c5cnc4ccc%28O%29cc45 could not be loaded.