ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1c%28c2CCN1%29%5BnH%5Dc3c2ccc%28OC%29c3/file?format=sdf&get3d=True  -- CC1c%28c2CCN1%29%5BnH%5Dc3c2ccc%28OC%29c3 could not be loaded.