Two new brominated diterpenes, namely, laurendecumtriol (1) and 11‐O‐deacetylpinnaterpene C (2), one new polybromoindole, 2,3,4,6‐tetrabromo‐1‐methyl‐1H‐indole (7), and six known natural products were isolated and identified from the marine red alga Laurencia decumbens. Their structures were elucidated on the basis of detailed spectroscopic and mass‐spectrometric analysis as well as by comparison with literature data. Based on 2D‐NMR experiments, the previously reported NMR data for pinnaterpene C (3) were reassigned.
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Ji et al. (2007) studied this question.
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