InChI=1S/C27H54O4Si/c1-9-10-11-12-14-17-20-23-24(21-18-15-13-16-19-22-25(28)29-8)31-32(30-23,26(2,3)4)27(5,6)7/h23-24H,9-22H2,1-8H3/t23-,24+/m0/s1