Author's Organization：Faculty of Pharmacy, Medical School, University of Hokkaido Faculty of Pharmacy, Medical School, University of Hokkaido Faculty of Pharmacy, Medical School, University of Hokkaido
The structure of ligustilide was discussed upon the fact that sedanonic acid, 3-butyl-phthalide, and 2-valerylcyclohexanecarboxylic acid were obtained by catalytic hydrogenation. Tentative structures were proposed on the basis of available data. The position of double bonds, however, remains to be determined.
