ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%26%2391%3BN%2B%26%2393%3B1%26%2361%3BC%28C%26%2361%3BCC2%26%2361%3BCC%26%2361%3BCC%26%2361%3BC21%29C%26%2361%3BCC3%26%2361%3BCC%26%2361%3BC%28C%26%2361%3BC3%29N%28C%29C.%26%2391%3BI-%26%2393%3B/file?format=sdf&get3d=True  -- CC%26%2391%3BN%2B%26%2393%3B1%26%2361%3BC%28C%26%2361%3BCC2%26%2361%3BCC%26%2361%3BCC%26%2361%3BC21%29C%26%2361%3BCC3%26%2361%3BCC%26%2361%3BC%28C%26%2361%3BC3%29N%28C%29C.%26%2391%3BI-%26%2393%3B could not be loaded.