ERROR opening https://cactus.nci.nih.gov/chemical/structure/c13c%28n%28c2ccccc12%29CCCN%28C%29C%29CCCCCC3/file?format=sdf&get3d=True  -- c13c%28n%28c2ccccc12%29CCCN%28C%29C%29CCCCCC3 could not be loaded.