- Actions of A-131701, a novel, selective antagonist for alpha-1A compared with alpha-1B adrenoceptors on intraurethral and blood pressure responses in conscious dogs and a pharmacodynamic assessment of in vivo prostatic selectivity. Hancock, A.A., Brune, M.E., Witte, D.G., Marsh, K.C., Katwala, S., Milicic, I., Ireland, L.M., Crowell, D., Meyer, M.D., Kerwin, J.F. J. Pharmacol. Exp. Ther. (1998)