InChI=1S/C24H30O4/c1-16(5-10-20-17(2)6-11-22(25)24(20,3)4)13-14-27-19-9-7-18-8-12-23(26)28-21(18)15-19/h7-9,12-13,15,20,22,25H,2,5-6,10-11,14H2,1,3-4H3/b16-13-