Nostoc sphaericum

Hyella caespitosa Bron et Flah Tedania ignis Nostoc sphaericum Tolypothrix tjipanasensis New Zealand Ascidian Australian Ascidian Didemnum sp. 

In 1990, Moore et al. reported the isolation of S-cyano-h-methoxy-ll-methyl-indolo[2,3-fl]carbazole (357), along with a minor component, 6-cyano-5-methoxy-indolo[2,3-fl]carbazole (358), from the blue-green alga Nostoc sphaericum EX-5-1 (340). These were the first, naturally occurring, indolo[2,3-fl]carbazole alkaloids with a simple indolo[2,3-fl]carbazole (356) framework (Scheme 2.92). These alkaloids are moderately active against herpes simplex virus type 2 and are weakly cytotoxic against murine and human cancer cell lines (340). 

A 6-cyano-5-methoxy-12-methylindolo[2,3-a]carbazole and 6-cyano-5-methoxyindolo[3-a]carbazole were isolated from the blue-green alga Nostoc sphaericum [95]. These compounds are active against HSV-1. Larsen ct al. [96] isolated three new chlorine-containing P-carbolines, bauerines A-C, from the blue-green alga Dichothrix baueriana. These alkaloids show activity against HSV-2. 

Blue-green alga, Nostoc sphaericum Tunicate, Aplidium sp. 

Bisalputra T, Brown DL and Weier TE (1969) Possible respiratory sites in a blue-green alga, Nostoc sphaericum, as demonstrated by potassium tellurite and tetranitro-blue tetrazolium reduction, J. Ultrastruct. 

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See also in sourсe #XX -- [ , , ]

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