Direct and sensitized photolyses ot 1-biphenylyl-2,2-dimethylcyclopropane gave 2-methyl-4-biphenylyl-1-butene as sole product.Comparison of the product formati
Grandiflorenic acid(1),possessing potent contragestational activity,is an ent-kauranediterpenoid.It has been isolated from Mexical medicinal plant zoapatle(Mon