One of the most exciting and interesting aspects of the study of natural products is the “field work” involving ethnological and ethnobotanical studies and which, where apposite, have been alluded to in the present treatise
Many texts on alkaloids are limited to chemical aspects, whereas the somewhat unique and therapeutically significant biological activities of the Calabar bean’s alkaloids (particularly l-physostigmine) has led to a detailed and through presentation of these facets in the present treatise

Throughout this present study, along with a detailed account of what has been done, investigations of what remains to be done have been high-lighted and approaches to effecting this are suggested, including the interpretations of already – published data