ERROR opening https://cactus.nci.nih.gov/chemical/structure/N%28c1ccccc1%29%28Cc2ccccc2%29CCN3CCCC3/file?format=sdf&get3d=True  -- N%28c1ccccc1%29%28Cc2ccccc2%29CCN3CCCC3 could not be loaded.