It was a long-acting beta-agonist widely used in New Zealand in the early 1990s but withdrawn because of its association with an excess number of deaths.
References
Beasley R, Pearce N, Crane J, Burgess C. Withdrawal of fenoterol and the end of the New Zealand asthma mortality epidemic. Int Arch Allergy Immunol. 1995 May-Jun;107(1-3):325-7.
Spitzer WO, Suissa S, Ernst P, Horwitz RI, Habbick B, Cockcroft D, et al. The use of beta-agonists and the risk of death and near death from asthma. N Engl J Med. 1992 Feb 20, 1992;326(8):501-6.