ACE and Hypertension: Lisinopril 47, is a drug of the angiotensin-converting enzyme (ACE) inhibitor family which is used, primarily in the treatment of hypertension, heart failure, and frequently utilized after heart attack.86 Lisinopril 47, chemically is named as N2-[(1S)-1-carboxy-3-phenylpropyl]-l-lysyl-l-proline, but sold under the brand name of PRINVIL® provided by Merck.