halimedatrial

(organic chemistry) A diterpenoid trialdehyde, (1S,5R)-5-{(1R,2S)-2-[(1E)-2,6-dimethyl-1,5-heptadien-1-yl]-1-formylcyclopropyl}-2-cyclopentene-1,2-dicarbaldehyde, that is a chemical defense adaptation in the calcareous reef-building alga Halimeda