Now draw (2R,3S)-2-bromo-3-phenylpentane in the conformation from which it is most likely to undergo E2 elimination to give 3-phenyl-2-pentene. Follow this procedure: Choose Insert ? Template ? Conformers. Click on the appropriate conformer, and press Close. Click in the MarvinSketch window. The C-C bond in this structure should become the C2-C3 bond in (2R,3S)-2-bromo-3-phenylpentane. Type the name of an atom or group to add to the structure, or press the atom's button. Click on an H atom to replace that H atom with the atom or group at the tip of the cursor.