ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H10N2Si/c1-7(2,3)4-6-5/h4H,1-3H3/file?format=sdf&get3d=True  -- InChI=1S/C4H10N2Si/c1-7(2,3)4-6-5/h4H,1-3H3 could not be loaded.