In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+24C8 (CIRCLED LATIN CAPITAL LETTER S).
The Ⓢ symbol (Circled latin capital letter s, U+24C8), written as \circledS in LaTeX math mode.
TeXForm parses this entry as a character leaf mapped to U+24C8 (CIRCLED LATIN CAPITAL LETTER S).