ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc2cc%28O%29ccc2/N%3DN/c1ccc%28cc1%29%5BN%2B%5D%28%5BO-%5D%29%3DO/file?format=sdf&get3d=True -- Oc2cc%28O%29ccc2/N%3DN/c1ccc%28cc1%29%5BN%2B%5D%28%5BO-%5D%29%3DO could not be loaded.