Exhibit 99.1

The undersigned agree that this Schedule 13D, and all amendments thereto, relating to the Class A Common Stock of HighCape Capital Acquisition Corp. shall be filed on behalf of the undersigned.

DEERFIELD MGMT, L.P.
By: J.E. Flynn Capital IV, LLC, General Partner
By:	/s/ Jonathan Isler
Name:	Jonathan Isler
Title:	Attorney-in-Fact
DEERFIELD PARTNERS, L.P.
By: Deerfield Mgmt, L.P., General Partner
By: J.E. Flynn Capital IV, LLC, General Partner
By:	/s/ Jonathan Isler
Name:	Jonathan Isler
Title:	Attorney-in-Fact
DEERFIELD MANAGEMENT COMPANY, L.P.
By:  Flynn Management LLC, General Partner
By:	/s/ Jonathan Isler
Name:	Jonathan Isler
Title:	Attorney-in-Fact
JAMES E. FLYNN
/s/ Jonathan Isler
Jonathan Isler, Attorney-in-Fact