To draw: structural formulae for: Beta-damascenone (and ionones) (are rose ketone) found in in roses - contributes to the smell of roses and violets oxalic acid - sorrel family galantamine - a commercial alkaloid drug extracted from daffodils (also in snowflake, caucasian snowdrop, and amarylis) for treating polio and alzheimers. primin - in primulas the chemicals in spurges thiophenes, polythiophenes - daisy family [page 134 'poisoned weed' book] Plant Based Drugs; URL: http://www.rain-tree.com/plantdrugs.htm