Author's Organization:Hokkaido Institute of Pharmaceutical Sciences Hokkaido Institute of Pharmaceutical Sciences Hokkaido Institute of Pharmaceutical Sciences Hokkaido Institute of Pharmaceutical Sciences Hokkaido Institute of Pharmaceutical Sciences Hokkaido Institute of Pharmaceutical Sciences
A trifluoromethanesulfonate of anhydromesaconitine was subjected to photochemical reaction, which contains replacement of the bridgehead hydroxyl at C (13) by hydrogen, followed by catalytic hydrogenation, yielding isodelphinine.