InChI=1S/C33H66O4Si4/c1-24(34-38(4,5)6)33(37-41(13,14)15)23-29(36-40(10,11)12)30-27-17-16-25-22-26(35-39(7,8)9)18-20-31(25,2)28(27)19-21-32(30,33)3/h16,24,26-30H,17-23H2,1-15H3/t24-,26-,27?,28?,29+,30?,31-,32-,33-/m1/s1