ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CNCC2%26%2361%3BC1C%28%26%2361%3BO%29NO2%2C%20C1CNCc2c1c%28no2%29O/file?format=sdf&get3d=True -- C1CNCC2%26%2361%3BC1C%28%26%2361%3BO%29NO2%2C%20C1CNCc2c1c%28no2%29O could not be loaded.