ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C16H20N2O8/c1-18-8(7-3-2-4-17-6-7)5-9(14(18)22)25-16-12(21)10(19)11(20)13(26-16)15(23)24/h2-4,6,8-13,16,19-21H,5H2,1H3,(H,23,24)/t8?,9-,10+,11+,12-,13+,16-/m1/s1/file?format=sdf&get3d=True  -- InChI=1S/C16H20N2O8/c1-18-8(7-3-2-4-17-6-7)5-9(14(18)22)25-16-12(21)10(19)11(20)13(26-16)15(23)24/h2-4,6,8-13,16,19-21H,5H2,1H3,(H,23,24)/t8?,9-,10+,11+,12-,13+,16-/m1/s1 could not be loaded.