Is tesofensine a peptide?

What makes a molecule a peptide

The International Union of Pure and Applied Chemistry (IUPAC) defines peptides by how their building blocks connect. Amino-acid units join through a specific carbon-to-nitrogen connection called a peptide bond. That bond includes a carbon atom joined to oxygen by a double bond.

A chemical formula counts atoms. A structure shows how those atoms connect. To check tesofensine, compare its recorded structure with the peptide definition. A name, a claimed effect, or a category on a website cannot make that comparison.

What the tesofensine records show

PubChem records tesofensine as compound 11370864, with the formula C17H23Cl2NO. The World Health Organization published the same formula and a structure in its 2004 naming list. These records describe the named molecule.

The drawings show connected rings and an oxygen atom between carbon atoms. They show no carbon-to-oxygen double bond, so there is no peptide bond. This conclusion comes from comparing the recorded connections with the definition. Molecular size alone does not settle chemical class.

How strong is the evidence? The official structure records support this classification. They do not test a sample sold under the tesofensine name.

What reuptake inhibitor means

Nerve cells use chemical messengers, including dopamine, norepinephrine, and serotonin. Transporter proteins help take these messengers back into cells. Blocking this process is called reuptake inhibition. The term describes an action, while peptide describes a chemical structure.

A 2025 structural study examined tesofensine bound to the human dopamine transporter. Researchers produced the protein in laboratory cells and studied the purified complex. The paper describes tesofensine as a triple reuptake inhibitor and shows its ring structure.

The transporter protein and the molecule bound to it are separate substances. Binding to a protein does not turn tesofensine into a peptide. These laboratory findings explain molecular interactions. They do not establish a health result or a safe treatment for a person.

What a substance identifier can confirm

The U.S. Food and Drug Administration (FDA) lists tesofensine under BLH9UKX9V1. This code is a Unique Ingredient Identifier, or UNII. It helps connect records for a named substance. FDA states that having a UNII does not imply regulatory review or approval.

An identifier can help you find the intended chemical record. It does not prove the contents of a product using that name. Keep the structure check separate from questions about product quality, medical approval, and health effects.

How to check the chemical class

Open the PubChem record for tesofensine and confirm compound 11370864. Compare its drawing with the WHO structure on printed page 106. Then read the IUPAC peptide definition. The key check is whether amino-acid units connect through peptide bonds.

The tesofensine structures fail that structural test. The name identifies a small organic molecule. Mechanism terms and substance codes answer different questions. For the broader definition, read what makes a molecule a peptide.