Results Chemical Synthesis. Compound 1 was prepared by sequential alkylation of o- anisidine with 1, Zdibromoethane and then methyl a-bromoacetate. The lactones of 1 and 3 were prepared by treatment of the carboxylic acids with thionyl chloride. Esters of 5 were prepared by treatment of the carboxylic acids with thionyl chloride in the presence