ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/3Mn.2H2O.2O/h;;;2*1H2;;/q;2* 1;;;;/p-2/file?format=sdf&get3d=True  -- InChI=1S/3Mn.2H2O.2O/h;;;2*1H2;;/q;2* 1;;;;/p-2 could not be loaded.