InChI=1S/C23H32O4/c1-15(2)8-6-9-16(3)10-7-11-17(4)12-13-19-18(5)20(14-24)22(26)23(27)21(19)25/h8,10,12,14,25-27H,6-7,9,11,13H2,1-5H3/b16-10+,17-12+