InChI=1S/C21H30O6/c1-11(2)20(23)27-19-17(12(3)8-7-9-25-15(6)22)13(4)10-16-18(19)14(5)21(24)26-16/h11-12,16,18-19H,5,7-10H2,1-4,6H3/t12?,16-,18-,19+/m1/s1