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