InChI=1S/C21H35NO4Si/c1-8-12-18-13-10-11-14-20(18)25-16-19(26-27(5,6)7)15-22(17(3)4)21(23)24-9-2/h8,10-11,13-14,17,19H,1,9,12,15-16H2,2-7H3