Exhibit 1
AGREEMENT
After reasonable inquiry and to the best of the knowledge and belief of
the undersigned, the undersigned hereby agree that only one statement containing
the information required by Schedule 13D need be filed with respect to the
ownership by each of the undersigned of the shares of common stock of Hybridon,
Inc.
EXECUTED as a sealed instrument this 8th day of September, 2003.
/s/ Youssef El-Zein
_____________________________________
Youssef El-Zein
Pillar Investment Limited
/s/ Youssef El-Zein
_____________________________________
By: Youssef El-Zein
Title: Director
Optima Life Sciences Limited
/s/ Xxxxx Xxxxxx
_____________________________________
By: Xxxxx Xxxxxx
Title: Director
