InChI=1S/C21H38O5Si2/c1-16(12-18(22)23)10-11-21(26-28(7,8)9)19(2)13-17(25-27(4,5)6)14-20(21,3)24-15-19/h10-12,17H,13-15H2,1-9H3,(H,22,23)/b11-10+,16-12-/t17?,19-,20-,21-/m0/s1