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. 2016 Feb 4;6:20340. doi: 10.1038/srep20340

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(a) Chemical structures of C1 (8) and C2 (9)³⁹. (b) Typical HR-LC/MS extracted ion chromatograms (EICs) for Arg (2), Int-A’ (3), Int-C’2 (4), Cyclic-C’ (7) (positive mode), C1 (8) and C2 (9) (negative mode) in the extracts from the cells of A. circinalis (TA04).