A novel acetylene-containing para-[14]-cyclophane, nostocyclyne A (1), possessing antimicrobial activity, is the major active metabolite of the natural bloom of the cyanobacterium Nostoc sp. (TAU strain IL-220). Homonuclear and heteronuclear 2D NMR techniques as well as HREIMS determined the gross structure of 1.
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Ploutno et al. (2000) studied this question.
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