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(a) Absorption spectrum of an extract from N. flagelliforme in 20% methanol. (b) Chromatogram of UV-absorbing putative OS-MAAs from N. flagelliforme. Lichrospher RP-18 (5 μ, 250*4 mm I.D), 1 mL min−1, 0–15 min: 100% A (0.02% acetic acid in water). 15–30 min: linear increase from 0% B (acetonitrile) to 20% B.
