THC-D9 (Delta 9–tetrahydrocannabinol)

THC-D9 (Delta-9-Tetrahydrocannabinol) is the primary psychoactive compound in cannabis — it’s the one most responsible for the classic cannabis “high.” Delta-9 binds with receptors in the brain’s endocannabinoid system, producing effects that range from euphoria and relaxation to altered perception and increased appetite.