EX-99 2 ex_1sc13da2-evergreen.txt EXHIBIT 1 EXHIBIT 1 --------- JOINT FILING AGREEMENT Each of the undersigned hereby acknowledges and agrees, in compliance with the provisions of Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, that the Schedule 13D to which this Agreement is attached as an Exhibit (the "Schedule 13D"), and any amendments thereto, will be filed with the Securities and Exchange Commission jointly on behalf of the undersigned. This Agreement may be executed in one or more counterparts. Dated: November 8, 2004 PERSEUS 2000, L.L.C. By: Perseus 2000 Management, L.L.C. Managing Member By: Perseus EC, L.L.C. Managing Member By: /s/ Rodd Macklin --------------------------------------- Name: Rodd Macklin Title: Secretary and Treasurer PERSEUS 2000 MANAGEMENT, L.L.C. By: Perseus EC, L.L.C. Managing Member By: /s/ Rodd Macklin --------------------------------------- Name: Rodd Macklin Title: Secretary and Treasurer PERSEUS EC, L.L.C. By: /s/ Rodd Macklin --------------------------------------- Name: Rodd Macklin Title: Secretary and Treasurer PERSEUSPUR, L.L.C. By: /s/ Rodd Macklin --------------------------------------- Name: Rodd Macklin Title: Secretary and Treasurer /s/ Rodd Macklin, Attorney-in-Fact ---------------------------------------------- FRANK H. PEARL