InChI=1S/C15H24O7S/c1-14(2)4-7-11(13(14)22-23(19,20)21)15(3)5-9(17)10(15)8(6-16)12(7)18/h7,9,11-13,16-18H,4-6H2,1-3H3,(H,19,20,21)/t7?,9?,11?,12?,13?,15-/m1/s1