All the suggested routes in SimBrief from ENBR to LEAL are not Eurocontrol valid as per AIRAC 2404. Most of them include airways which have later changed direction or name.
A route I have found that IS compliant:
TUXIL ZOL ATNAK TIPAN N866 LARDI L74 TOPPA TULIP WOODY NIK N872 MEDIL UN872 KOVIN UM728 RESMI UN857 DISAK DIRMO GUERE EVPOK AGN ANETO POSSY XIMPE RIMES SAURA TATOS PLANA VLC