Ibere Pharmaceuticals (IBER) 8-KChanges in Registrant's Certifying Accountant

Exhibit 16.1

August 4, 2021

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC  20549

Commissioners:

We have read the statements made by Ibere Pharmaceuticals under Item 4.01 of its Form 8-K dated August 4, 2021.  We agree with the statements concerning our Firm in such Form 8-K; we are not in a position to agree or disagree with other statements of Ibere Pharmaceuticals contained therein.

Very truly yours,

/s/ Marcum LLP

Marcum LLP