ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=I1/C3H9N3Si/c1-7(2,3)6-5-4/h1-3H3/file?format=sdf&get3d=True  -- InChI=I1/C3H9N3Si/c1-7(2,3)6-5-4/h1-3H3 could not be loaded.