Hemopressin(rat) TFA, a nonapeptide originating from the α1-chain of hemoglobin, was first isolated from rat brain homogenates. It acts as an orally active, selective, and inverse agonist of the CB1 cannabinoid receptors and demonstrates antinociceptive effects in models of inflammatory pain [1] [2].

Hemopressin TFA, a nonapeptide originating from the α1-chain of hemoglobin and initially isolated from rat brain homogenates, is an orally active, selective inverse agonist of CB1 cannabinoid receptors that demonstrates antinociceptive effects in inflammatory pain models [1] [2].