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