Complex sentence: CB1 receptors are found predominantly in the brain and nervous system, as well as in peripheral organs and tissues, and are the main molecular target of the endocannabinoid ligand (binding molecule), anandamide, as well as it's mimetic phytocannabinoid, THC.
Split into simpler sentences: CB1 receptors are found predominantly in the brain and nervous system, as well as in peripheral organs and tissues. They are the main molecular target of the endocannabinoid ligand (binding molecule), anandamide, as well as it's mimetic phytocannabinoid, THC.