BVF PARTNERS L P/IL bought ELDN

Footnotes

This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), Biotechnology Value Trading Fund OS LP ("Trading Fund OS"), BVF Partners OS Ltd. ("Partners OS"), BVF I GP LLC ("BVF GP"), BVF II GP LLC ("BVF2 GP"), BVF GP Holdings LLC ("BVF GPH"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934 (the "Exchange Act") that collectively beneficially owns over 10% of the Issuer's outstanding shares of Common Stock (the "Common Stock"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.; Pursuant to a securities purchase agreement between the Issuer and certain institutional and accredited investors, including certain of the Reporting Persons (the "2024 Purchasers"), the Issuer agreed to issue and sell to the 2024 Purchasers in a private placement (the "2024 Private Placement") shares of Common Stock at a price of $2.37 per share, and pre-funded warrants (the "2024 Pre-Funded Warrants") at a price of $2.369 per underlying share, which are exercisable into shares of Common Stock at an exercise price of $0.001 per share.; 2024 Pre-Funded Warrants purchased in the 2024 Private Placement. The 2024 Pre-Funded Warrants are exercisable immediately and shall expire when exercised in full. The 2024 Pre-Funded Warrants cannot be exercised by the Reporting Persons if, after giving effect thereto, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) of the Exchange Act, more than 9.99% of the outstanding shares of Common Stock, subject to certain exceptions.; Securities owned directly by Trading Fund OS. As the general partner of Trading Fund OS, Partners OS may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the investment manager of Trading Fund OS and the sole member of Partners OS, Partners may be deemed to beneficially own the securities owned directly by Trading Fund OS. As the general partner of Partners, BVF Inc. may be deemed to beneficially own the securities owned directly by Trading Fund OS. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the securities owned directly by Trading Fund OS.