InChI=1S/C27H32O4/c1-26-13-11-17(25(30)31)15-18(26)5-8-20-21-9-10-23(27(21,2)14-12-22(20)26)24(29)16-3-6-19(28)7-4-16/h3-7,15,20-23,28H,8-14H2,1-2H3,(H,30,31)/t20-,21-,22-,23+,26-,27-/m0/s1