Lyngbya majuscula alkaloids

The Okinawan ascidian Lissodinum sp. produces the cytotoxic diterpene alkaloids haterumaimides J (99) and K (100) [86[. The incredibly prolific cyanobacterium Lyngbya majuscula has furnished the quinoline alkaloid 101 [87[. The new quinolones 102 and 103 were isolated from the sponge Hyrtios erecta [26[. 

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