ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2Na.H2S4/c;;1-3-4-2/h;;1-2H/q2*+1;/p-2/file?format=sdf&get3d=True -- InChI=1S/2Na.H2S4/c;;1-3-4-2/h;;1-2H/q2*+1;/p-2 could not be loaded.