A cyanobacterial hepatotoxin, nodularin-Har, having a homoarginine instead of an arginine in nodularin, was isolated from Nodularia PCC7804. The structure was elucidated as 1 on the basis of 2D NMR and FABMS. The LD(50) (mouse ip) value of 1 was 70 microg/kg.
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Saito et al. (2000) studied this question.
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