As of July 31, 2013, the Company has the following warrants to purchase common stock outstanding:
| Number of Shares | Warrant Exercise | Warrant | ||||||
| To be Purchased | Price per Share | Expiration Date | ||||||
| 8,470,661 | $ | 0.76 | December 15, 2014 | |||||
| 3,413,928 | $ | 0.79 | February 4, 2015 | |||||
| 300,000 | $ | 0.39 | (average) | February 9, 2015 | ||||
| 200,000 | $ | 1.25 | March 7, 2015 | |||||
| 5,157,813 | $ | 1.00 | March 15, 2015 | |||||
| 102,016,744 | $ | 0.03 | March 31, 2016* | |||||
| 2,508,560 | $ | 0.03 | July 11, 2016* | |||||
| 27,272,720 | $ | 0.03 | September 30, 2016* | |||||
| 7,500,000 | $ | 0.03 | February 1, 2017* | |||||
16,389,512 |
$ | 0.03 | August 10, 2017* | |||||
24,166,666 |
$ | 0.03 | December 12, 2017* | |||||
40,833,335 |
$ | 0.03 | June 17, 2018* | |||||
| 238,229,939 | ||||||||
* Subject to price protection provisions as described below.