ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2Al.4O.2Sr/q2*+3;4*-2;2*+2/file?format=sdf&get3d=True  -- InChI=1S/2Al.4O.2Sr/q2*+3;4*-2;2*+2 could not be loaded.