InChI=1S/C21H30O7/c1-11(2)18(22)27-15-9-20(5)16(24-6)10-21(25-7,28-20)12(3)8-14-17(15)13(4)19(23)26-14/h8,11,14-17H,4,9-10H2,1-3,5-7H3/b12-8-/t14-,15-,16+,17+,20+,21+/m1/s1