InChI=1S/C22H32O4/c1-16(2)14-21(24)15-19(5)22(25)11-10-17(3)8-7-9-18(4)12-13-26-20(6)23/h8,12,14H,5,7,9-11,13,15H2,1-4,6H3/b17-8+,18-12+