InChI=1S/C14H18O7S/c1-9(2)3-5-11-7-10(4-6-12(11)15)8-13(14(16)17)21-22(18,19)20/h3-4,6-7,13,15H,5,8H2,1-2H3,(H,16,17)(H,18,19,20)