(E)-3-((1R,4S,6S)-4-Acetoxy-2,2,6-trimethyl-7-oxa-bicyclo[4.1.0]hept-1-yl)-acrylic acid methyl ester

(E)-3-((1S,4S,6R)-4-Acetoxy-2,2,6-trimethyl-7-oxa-bicyclo[4.1.0]hept-1-yl)-acrylic acid methyl ester