ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2K.Mn.2H2O4S/c;;;2*1-5(2,3)4/h;;;2*(H2,1,2,3,4)/q2*+1;+2;;/p-4/file?format=sdf&get3d=True -- InChI=1S/2K.Mn.2H2O4S/c;;;2*1-5(2,3)4/h;;;2*(H2,1,2,3,4)/q2*+1;+2;;/p-4 could not be loaded.