InChI=1S/C20H32/c1-7-16(2)10-8-11-17(3)13-14-19-18(4)12-9-15-20(19,5)6/h7,11,19H,1-2,4,8-10,12-15H2,3,5-6H3/b17-11+/t19-/m1/s1