InChI=1S/C21H52O6Si5/c1-28(2,3)23-17-19(25-30(7,8)9)21(27-32(13,14)15)18(24-29(4,5)6)16-20(22)26-31(10,11)12/h18-19,21H,16-17H2,1-15H3/t18-,19-,21-/m0/s1