α-Terpineol-d₆ is deuterated labeled Pulegone (HY-N1500). Pulegone, the major chemical constituent of Nepeta catariaessential oil which is an aromatic herb, is one of avian repellents^[1]. The molecular target for the repellent action of Pulegone in avian species is nociceptive TRP ankyrin 1 (TRPA1). Pulegone stimulates both TRPM8 and TRPA1 channel in chicken sensory neurons and suppresses the former but not the latter at high concentrations^[2].