[2R-(2α(1S*(2'S*,3a'R*,4'R*,7'R*,7a'R*),2Ξ*),3aα,4β,7β,7aα)]-2,2'-[[2-(Phenylmethoxy)-1-[(phenylmethoxy)methyl]-1,3-propandiyl]bis(oxy)]bis(octahydro-7,8,8-trimethyl-4,7-methanobenzofuran)