InChI=1S/C21H24O5/c1-13-16-10-14(6-5-9-22)11-19(25-4)21(16)26-20(13)15-7-8-17(23-2)18(12-15)24-3/h5-8,10-13,20,22H,9H2,1-4H3/b6-5+