InChI=1S/C15H22O5S/c1-5-10-13(16)6-12-9(4)14(20-21(17,18)19)7-11(8(2)3)15(10)12/h5,8,11-12,14-15H,4,6-7H2,1-3H3,(H,17,18,19)/b10-5-