9β-tert-butoxy-4(E)-ethylidene-8β-methyl-5-oxobicyclo[6.3.0]undean-2β- carboxylic Acid Methyl Ester

C₂₀H₃₂O₄

Mague, J. T.Li, C.-J.Chen, D.-L.Lu, Y.-Q.Haberman, J. X.

Acta Crystallographica Section C (1996) 52, 10 2597-2599

a=5.8088(3)Å   b=17.976(2)Å   c=18.213(2)Å

α=90.000°   β=90.000°   γ=90.000°