InChI=1S/C21H32O4/c1-13(12-22)5-4-6-14(2)15-9-10-21(3)17(15)11-16-18(23)7-8-19(24)20(16)25-21/h9,13-14,17,19,22,24H,4-8,10-12H2,1-3H3