Lycopodium inundatum

Besides dehydrolycopecurine (37) two other pentacyclic alkaloids, inundatine (38 CigH23N02) and isoinundatine (39 CieH23N02) are present among the alkaloids of Lycopodium inundatum (5). The structures of both were established by relating them to alopecurine (29) of known structure 10). 

Owing to the availability of only small amounts of material, the structure of another novel alkaloid, lycopecurine (19 R1 = OH, R2 = H) from Lycopodium alopecuroides has been elucidated with the aid of X-ray crystallographic analysis. A future report will deal with the isolation of dehydrolycopecurine (19 R1 + R2 = O) from L. inundatum, and its correlation with lycopecurine.6... 

Lycopodium alopecuroides elaborates alkaloids belonging to the lycopodine and fawcettidine ring systems and a new group of pentacyc-lic alkaloids (9, 10). The pentacyclic system arises from the lycopodine skeleton by bond formation between C-4 and C-10. Recently it has been shown that alkaloids of this type are also present in L. inundatum (5). 

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