- EM-652 (SCH 57068), a third generation SERM acting as pure antiestrogen in the mammary gland and endometrium. Labrie, F., Labrie, C., Bélanger, A., Simard, J., Gauthier, S., Luu-The, V., Mérand, Y., Giguere, V., Candas, B., Luo, S., Martel, C., Singh, S.M., Fournier, M., Coquet, A., Richard, V., Charbonneau, R., Charpenet, G., Tremblay, A., Tremblay, G., Cusan, L., Veilleux, R. J. Steroid Biochem. Mol. Biol. (1999)