ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/2C5H4N2O4.Zn/c2*8-3-1-2(4(9)10)6-5(11)7-3;/h2*1H,(H,9,10)(H2,6,7,8,11);/q;; 2/p-2/file?format=sdf&get3d=True  -- InChI=1S/2C5H4N2O4.Zn/c2*8-3-1-2(4(9)10)6-5(11)7-3;/h2*1H,(H,9,10)(H2,6,7,8,11);/q;; 2/p-2 could not be loaded.