Bromine-containing natural products

chemical compound

Bromoform is an organic compound with the chemical formula . It is a colorless liquid at room temperature, with a high refractive index and a very high density. Its sweet odor is similar to that of chloroform. It is one of the four haloforms, the others being fluoroform, chloroform, and iodoform. It is a brominated organic solvent. Currently its main use is as a laboratory reagent. It is very slightly soluble in water (one part bromoform in 800 parts water) and is miscible with alcohol, benzene, chloroform, ether, petroleum ether, acetone and oils.

thumb|right|300px|Tzitzit produced from a blue dye derived from [[Hexaplex trunculus and tied according to the opinion of the Sefer ha-Chinuch, resting atop volumes of the Shulchan Aruch.]] thumb|upright|The flag of Israel, which emulates the tekhelet color for the [[Star of David and the two tallit-like stripes.]] thumb|upright|A contemporary tekhelet thread tied according to the method of the 18th-century rabbi Vilna Gaon. thumb|A Jew wearing blue tzitzit, 15th-century

Halomon is a polyhalogenated monoterpene first isolated from the marine red algae Portieria hornemannii. Halomon has attracted research interest because of its promising profile of selective cytotoxicity that suggests its potential use as an antitumor agent.

Aplysiatoxin is a cyanotoxin produced by certain cyanobacteria species. It is used as a defensive secretion to protect these cyanobacteria from predation by fish, being a potent irritant and carcinogen, by acting as a powerful activator of protein kinase C. While this action has a tumour-promoting effect, protein kinase C activation can be medically beneficial for some other applications, and synthetic analogues of aplysiatoxin have been researched for anti-cancer effects.