Three metabolites deoxytrichodermaerin (a new harziane lactone), harzianol A and harzianone were obtained from A-WH-20-2, an endophyte from marine red alga . Their structures and relative configurations were unequivocally assigned by spectroscopic techniques, and the absolute configuration of deoxytrichodermaerin was established by analysis of the ECD curve aided by quantum chemical calculations. Deoxytrichodermaerin represents the second harziane lactone with an ester linkage between C-10 and C-11. Harzianol A occurs as a natural product of for the first time. Harzianone has been previously discovered from cf-11. These isolates exhibited potent inhibition of some marine plankton species.

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http://dx.doi.org/10.1080/14786419.2019.1622110DOI Listing

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