InChI=1S/C21H30O4/c1-7-13(2)19(22)25-18-9-11-21(5)10-8-16(12-17(21)15(18)4)14(3)20(23)24-6/h7,16,18H,3,8-12H2,1-2,4-6H3/b13-7-/t16-,18+,21+/m1/s1