Events and Webcast

May 22, 2013
Bloom Burton & Co. Healthcare Investor Conference
Toronto
10:30 a.m. (Eastern Time)
Presentation by: Dennis Turpin, Vice President and CFO

May 8, 2013
Annual Shareholders Meeting
10:30 a.m.
Norton Rose Canada
1 Place Ville Marie #2500
Montreal, Quebec

May 8, 2013
Financial and operating results - First Quarter 2013
8:30 a.m., Eastern Time
Conference call and webcast

April 25, 2013
Introductory Analyst and Investor Conference Call
4:30 p.m. (Eastern Time)
Presentation by: David A. Dodd, President and CEO
Conference call and Webcast

April 10, 2013
AACR Annual Meeting
Poster presentation on Disorazol Z cytotoxic conjugates
B. Aicher, PhD, Director of preclinical development
Washington, D.C.

Friday March 22, 2013
2012 Annual Financial and Operating Results
8:30 a.m., Eastern Time
Conference call and Webcast