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Trikoramide A, a Prenylated Cyanobactin from the Marine Cyanobacterium Symploca hydnoides.

Ma Yadanar PhyoChi Ying Gary DingHui Chin GohJun Xian GohJi Fa Marshall OngSiew Herng ChanPui Yi Maria YungHartono CandraLik Tong Tan
Published in: Journal of natural products (2019)
A new cyclic decapeptide, trikoramide A (1), has been isolated from samples of the marine cyanobacterium Symploca hydnoides, collected from Bintan Island, Indonesia. Trikoramide A (1) is a C-prenylated cyclotryptophan-containing cyanobactin. Its planar structure was deduced by 1D and 2D NMR spectroscopy as well as HR-MS/MS data. In addition, its absolute configuration was determined by Marfey's method and 2D NOESY NMR spectroscopic analysis. Compound 1 possessed cytotoxicity against the MOLT-4 and AML2 cancer cell lines with IC50 values of 4.8 and 8.2 μM, respectively.
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