Crystal Structure of the ER-alpha Ligand-binding Domain in Complex with a para-Hydroxyl-substituted, Sulfoxide-bridged Oxabicyclic Heptene Sulfonate (SOBHS)-2 Analog 4-hydroxyphenyl (1S,2S,4S,5S,6R,7S)-5,6-bis(4-hydroxy-2-methylphenyl)-7-thiabicyclo[2.2.1]heptane-2-sulfonate 7-oxide