ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%28c1ccc%28cc1%29CN2CCCCC2%29CCCN3CCCCC3/file?format=sdf&get3d=True  -- O%28c1ccc%28cc1%29CN2CCCCC2%29CCCN3CCCCC3 could not be loaded.