ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C2H8NO4P/c3-1-2(4)8(5,6)7/h2,4H,1,3H2,(H2,5,6,7)/file?format=sdf&get3d=True  -- InChI=1S/C2H8NO4P/c3-1-2(4)8(5,6)7/h2,4H,1,3H2,(H2,5,6,7) could not be loaded.