ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28N%29Cc2cc%28OC%29c%28OCc1ccccc1%29c%28c2%29OC/file?format=sdf&get3d=True  -- CC%28N%29Cc2cc%28OC%29c%28OCc1ccccc1%29c%28c2%29OC could not be loaded.