ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/2Ni.Si%2C%20InChI%3D1S/2Ni.H4Si/h%3B%3B1H4/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/2Ni.Si%2C%20InChI%3D1S/2Ni.H4Si/h%3B%3B1H4 could not be loaded.