(3aS)-3,9a,17bβ,17cβ-Tetrahydro-4,9aα,16-trihydroxy-2,3aβ,6,14,17-pentamethylbenzo[kl]bisbenzofuro[3,2-b:2,3-i]xanthen-9(3aH)-one [ 93376-71-7 ]