InChI=1S/C21H29NO6S/c1-17(2)16-22-21(24)12-10-8-6-4-3-5-7-9-11-18-13-14-19(23)20(15-18)28-29(25,26)27/h6,8-15,17,23H,3-5,7,16H2,1-2H3,(H,22,24)(H,25,26,27)/b8-6+,11-9+,12-10+