ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc2ccc1%5BnH%5Dcc%28CCN%28C%29C%29c1c2/file?format=sdf&get3d=True  -- COc2ccc1%5BnH%5Dcc%28CCN%28C%29C%29c1c2 could not be loaded.