2,7-Dioxabicyclo[3.2.0]hept-3-ene, 1-(1,3-dioxolan-2-yl)-6,6-diphenyl-

1,1-diphenylethane-1,2-diol

6,6-diphenyl-2,7-dioxabicyklo<3,2,0>-3-heptene-1-al diacetate