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meso-Butestrol , also known as 2,3-bisbutane, is a synthetic nonsteroidal estrogen which was never marketed. It is a so-called "short-acting" or "impeded" estrogen. meso-Butestrol is structurally related to diethylstilbestrol and other stilbestrols. The fully potent counterpart to meso-butestrol is meso-hexestrol, analogously to the relationship of dimethylstilbestrol to diethylstilbestrol.
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