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