InChI=1S/C21H28O6/c1-13(22)7-9-21(2)16(5-4-6-17(21)20(24)25-3)15-11-18(27-19(15)23)14-8-10-26-12-14/h8,10,12-13,17-18,22H,4-7,9,11H2,1-3H3