(R)-1-((1S,3a'R,5S,5'S,6R,6a'R)-2',2'-dimethyl-7-(prop-1-enyl)dihydro-3a'H-3-oxaspiro[bicyclo[3.2.0]heptane-6,6'-furo[2,3-d][1,3]dioxole]-5'-yl)ethane-1,2-diol

(Z)-ethyl 2-((3aR,5R,6aR)-2,2-dimethyl-5-vinylfuro[2,3-d][1,3]dioxol-6(3aH,5H,6aH)-ylidene)acetate