ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28Cc1ccc2c%28c1%29OC%28O2%29%28F%29F%29N/file?format=sdf&get3d=True  -- CC%28Cc1ccc2c%28c1%29OC%28O2%29%28F%29F%29N could not be loaded.