In TeXForm#
TeXForm parses this entry as a character leaf mapped to U+21AA (RIGHTWARDS ARROW WITH HOOK).
\to\rightarrow\longrightarrow\mapsto\xrightarrow\Rightarrow\Leftrightarrow\leftarrow\longmapsto\hookrightarrow\Longrightarrow\implies
\hookrightarrowSymbol
The ↪ symbol (Rightwards arrow with hook, U+21AA), written as \hookrightarrow in LaTeX math mode.