InChI=1S/C16H26O4S/c1-6-8-14(4)9-7-10-15(5)12-16(11-13(2)3)20-21(17,18)19/h6,8,10-11,16H,1,7,9,12H2,2-5H3,(H,17,18,19)/b14-8+,15-10-