InChI=1S/C27H32O4/c1-5-6-8-11-19-14-15-21(22(16-19)20-12-9-7-10-13-20)26(30)23-25(29)17(2)24(28)18(3)27(23)31-4/h5-7,9-10,12-14,21-22,28-29H,8,11,15-16H2,1-4H3/b6-5+/t21-,22+/m0/s1