ERROR opening https://cactus.nci.nih.gov/chemical/structure/N%23Cc2cc%28nnc2NCCN1CCOCC1%29c3ccccc3/file?format=sdf&get3d=True  -- N%23Cc2cc%28nnc2NCCN1CCOCC1%29c3ccccc3 could not be loaded.