ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DO%29C1%28C%28%3DC%29CC2C1%28CCC3C2CCC4%3DCC%28%3DO%29CCC34%29C%29O/file?format=sdf&get3d=True  -- CC%28%3DO%29C1%28C%28%3DC%29CC2C1%28CCC3C2CCC4%3DCC%28%3DO%29CCC34%29C%29O could not be loaded.