As of December 31, 2013, the Company had the following warrants issued:
| Total | ||||||||||
| Issue Date | Holder | Warrants | Ex. Price | |||||||
| 5/7/2009 | Kingsbridge Capital Limited | 200,000 | $ | 11.35 | ||||||
| 4/26/2013 | Hercules Technology Growth Capital | 693,202 | $ | 1.12 | ||||||
| 10/31/2013 | Sabby Management, LLC “Series A” | 6,857,142 | $ | 0.85 | ||||||
| 10/31/2013 | Sabby Management, LLC “Series B Prefunded Warrants” | 4,343,247 | $ | 0.70 | ||||||
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| 12,093,591 | ||||||||||