ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C3H9N3Si/c1-7%282%2C3%296-5-4/h1-3H3/file?format=sdf&get3d=True  -- InChI%3DInChI%26%2361%3B1S/C3H9N3Si/c1-7%282%2C3%296-5-4/h1-3H3 could not be loaded.