Polyhalogenated Monoterpenes from <i>Plocamium </i><i>cartilagineum</i> from the Portuguese Coast

Abstract

Examination of the red alga Plocamium cartilagineum (L.) Dixon collected at two locations along the Portuguese coast yielded two new acyclic polyhalogenated monoterpenes, (3 Z,7 E )-5,8-dibromo-2,6-dichloro-2,6-dimethylocta-3,7-dien-1-al ( 2) and ( E )-3,8-dibromo-2,7-dichloro-2,6-dimethyloct-5-ene ( 3 ), and the known compounds 1, 4 − 6, and 8 . The structures were established by spectral methods.