InChI=1S/C20H28O2/c1-11-6-7-20-12(2)8-14(21)13(18(20,3)4)9-16(20)19(5)10-15(22)17(11)19/h12-13,16H,6-10H2,1-5H3/t12-,13-,16+,19+,20-/m1/s1