ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1c%28C%28N%29%3DN%29ccc%28OCCCCCCOc2ccc%28cc2%29C%28N%29%3DN%29c1/file?format=sdf&get3d=True  -- c1c%28C%28N%29%3DN%29ccc%28OCCCCCCOc2ccc%28cc2%29C%28N%29%3DN%29c1 could not be loaded.