ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BC%40H%5D1c2c%28cc%28c%28c2O%29OC%29OC%29CCN1/file?format=sdf&get3d=True  -- C%5BC%40H%5D1c2c%28cc%28c%28c2O%29OC%29OC%29CCN1 could not be loaded.