Oroidin-Related Compounds

Stevensine (17), which is related to oroidin (13) by oxidative cyclization, was isolated from an unidentified Micronesian sponge (43). The identical compound (17), named odiline, was obtained from aqueous extracts of a New Caledonian sponge, Pseudaxinyssa cantharella (44). This sponge also contained many other oroidin analogs dibromocantharelline [(+) -18], compounds 19, 20, 21, and (+)-dibromophakeline (22). The 

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