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Piumerinine, a novel lupin alkaloid has been isolated from the stem of Plumeria r u b r a and assigned s t r u c t u r e 1 on the basis of spectral studies.This constitutes t h e f i r s t example of the occurrence of bicyclic lupin alkaloids in subfamily Plumerioideae of the Apocyanaceae.
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Malik et al. (1989) studied this question.
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