ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/H2N2O2.2Na/c3-1-2-4;;/h(H,1,4)(H,2,3);;/q;2*+1/p-2/file?format=sdf&get3d=True -- InChI=1S/H2N2O2.2Na/c3-1-2-4;;/h(H,1,4)(H,2,3);;/q;2*+1/p-2 could not be loaded.