InChI=1S/C16H21NO6S/c1-16(15(19)20)10-24-14(17-16)12-4-3-11(9-13(12)18)23-8-7-22-6-5-21-2/h3-4,9,18H,5-8,10H2,1-2H3,(H,19,20)/t16-/m1/s1