ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2ClHO4.Mg/c2*2-1(3,4)5;/h2*(H,2,3,4,5);/q;; 2/p-2/file?format=sdf&get3d=True -- InChI=1S/2ClHO4.Mg/c2*2-1(3,4)5;/h2*(H,2,3,4,5);/q;; 2/p-2 could not be loaded.