Homarine was isolated from nine edible species of marine molluscs
belonging to classes Gastropoda, Bivalvia, and Cephalopoda. A thorough
chromatographic, NMR and MS study provided evidence that homarine is a
common and abundant metabolite of all these species. This study casts
doubt on a previous assertion that 1,1’-dimethyi-[2,2’]-bipyridinium
is a metabolite of the Bivalve Callista chione