<chr_var letter="N" var="2">N2</chr_var> auoit <chr_var letter="s" var="long">∫</chr_var>ibele en la c<chr_abbr type="reg" class="dc" expan="on" cert="no">o-hbar</chr_abbr>tree. <note place="unspecified" anchored="yes">This differs significantly from U-F.</note> 