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The known alkaloids reticuline (1), coclaurine (3), N-methylcoclaurine (2), laurotetanine (7), N-methyl-laurotetanine (8), laurolitsine (10), isoboldine (9), norisocorydine (6), norargemonine (ll), bisnorargemonine (12), thalifoline (16) and scoulerine (13) were isolated from the New Caledonian plant Cryptocarya longifolia together with two new bases, longifolidine (4) and longifolonine (14). Spectroscopic methods were used for identification and structural investigation, and X-ray crystallographic analysis to determine the structures of thalifoline and longifolonine.
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Bick et al. (1981) studied this question.
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