ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%26%2361%3BC%28NC%26%2361%3BN1%29CC%28C%28%26%2361%3BO%29O%29N/file?format=sdf&get3d=True -- C1%26%2361%3BC%28NC%26%2361%3BN1%29CC%28C%28%26%2361%3BO%29O%29N could not be loaded.