InChI=1S/C21H34O6/c1-4-6-8-9-13-11-15(22)14(10-7-5-2)18(24)16(13)21-20(26)19(25)17(23)12(3)27-21/h11-12,17,19-26H,4-10H2,1-3H3/t12-,17-,19+,20-,21+/m1/s1