InChI=1S/C9H13NO7S/c1-4(11)10-5(8(14)15)3-18-6(9(16)17)2-7(12)13/h5-6H,2-3H2,1H3,(H,10,11)(H,12,13)(H,14,15)(H,16,17)/p-3/t5-,6?/m0/s1