Flowchart based on table of dependencies

[primuspaul]

I need to automatically create a flowchart based on a table containing dependencies and items. It would be formatted like this (two columns):

Item - Dependencies
Item1 - Item3,Item4,Item5

Each item can have multiple items on which it depends and some items will be dependencies of multiple other items. Under no circumstances will two items be dependencies of each other. For example, Item1 above depends on Item3, 4, and 5, but never will Item3, 4, or 5 depend on Item 1. I want the chart above to be used to generate a flowchart such as:

     1
   / | \
  3  4  5

Is this possible in Excel?