- Evidence for a molecular mechanism of teratogenicity of SB-236057, a 5-HT1B receptor inverse agonist that alters axial formation. Augustine-Rauch, K.A., Zhang, Q.J., Leonard, J.L., Chadderton, A., Welsh, M.J., Rami, H.K., Thompson, M., Gaster, L., Wier, P.J. Birth defects research. Part A, Clinical and molecular teratology. (2004)