EX-2.1 3 ecl_tpiv13dex21.htm EXHIBIT 2-1

CUSIP No. 876033408 Exhibit 2.1

Form of Amended Series A-1 Warrant to Purchase Common Stock (Incorporated herein by reference to Exhibit 4.6 to the Issuer’s Form 8-K filed with the U.S. Securities and Exchange Commission on August 11, 2016)