InChI=1S/C27H30O5/c1-4-5-7-10-18-13-14-20(21(15-18)19-11-8-6-9-12-19)26(31)23-25(30)17(2)24(29)22(16-28)27(23)32-3/h4-6,8-9,11-13,16,20-21,29-30H,7,10,14-15H2,1-3H3/b5-4+/t20-,21+/m0/s1