mancinellin, and  sapogenin , phloracetophenone-2,4-dimethylether is present in the leaves, while the fruits possess  physostigmine . The  Caribs  used the sap of this tree to  poison  their  arrows  and would tie captives to the trunk of the tree, ensuring a slow and painful death. A  poultice  of  arrowroot  ( Maranta arundinacea