ERROR opening https://cactus.nci.nih.gov/chemical/structure/s1c%28ccc1%29CN%28c2ccccc2%29C3CCN%28C%29CC3/file?format=sdf&get3d=True  -- s1c%28ccc1%29CN%28c2ccccc2%29C3CCN%28C%29CC3 could not be loaded.