Nylon $1313$ has been investigated by the U$.$S$.$ Department of Apriculture as a potential engineering platic.

Starting point for the synthesis is erucic acid, $C{H}_3(C{H}_2{)}_{7}CH=CH(C{H}_2{)}_{11}C{O}_{2}H$

obeainable from the seeds of crambe, a potential cartle feed. Beginaing with crucis acid as the only sourse of carbon compounds, sugpest a route to nylon $1313.$