*Please inquire the availability for this product. Δ2-Doramectin is an irreversible base degradation product of doramectin found in animals treated with doramectin and in the environment. Δ2-Doramectin is formed by rearrangement of the naturally occurring Δ3-group in doramectin to the 2-position. Despite the importance of doramectin as an anthelmintic in animal health, there are no published reports of the biological activity or the levels of Δ2-Doramectin in animals or in the environment.