ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1c2ccccc2C%28%3DO%29N1CCCCN4CCN%28CC4%29c3ccccc3OC/file?format=sdf&get3d=True  -- O%3DC1c2ccccc2C%28%3DO%29N1CCCCN4CCN%28CC4%29c3ccccc3OC could not be loaded.