Polyhalogenation, terpenes

In Figure 6.4 and in the A Word About...Halogenated Organic Compounds from the Sea, halomon, a polyhalogenated terpene produced by red algae, is shown. 

FIGURE 43.3. Violacene 64, halomon 67, and related polyhalogenated terpenes. 

In the sea, the brown algae give unusual diterpenes, tlK red seaweeds polyhalogenated mono- and higher terpenes and C,5 acetogenins, and the green seaweeds cyclopeptides and masked-aldehyde sesquiterpenes (Table 9.1). Freshwater algae are fewer and, as for as it is known, unproductive. 

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