ERROR opening https://cactus.nci.nih.gov/chemical/structure/c4cc1OCOc1cc4OCC2C%28c3ccc%28F%29cc3%29CC5NC2CC5/file?format=sdf&get3d=True  -- c4cc1OCOc1cc4OCC2C%28c3ccc%28F%29cc3%29CC5NC2CC5 could not be loaded.