\sixheterov[{
B\xFiveCycle(0,0){-18}[ce]{2==\textcolor{white}{■};2==\downnobond{N}{H};4==N;
3s==\put(-16,-26){\rotatebox{18}{---O$^-$Na$^+$}}
}[e]
}]
{4==\downnobond{N}{H};6==HN}{1D==O;5D==O}[]
\put(-750,0){尿酸ナトリウム(NaU)}
\put(-1100,-200){NaU $\raisebox{1mm}{$\tikz\draw[thick,-stealth] (0,0) -- (1,0);$}$ U$^-$ + Na$^+$}
\put(-1350,-330){尿酸ナトリウム $\spc$ 尿酸イオン}
\put(-1100,-600){U$^-$ + H$_2$O $\raisebox{0.7mm}{$\tikz{\draw[thick,-stealth] (0,0.075) -- (1,0.075);\draw[thick,-stealth] (1,-0.075) -- (0,-0.075);}$}$ HU + OH$^-$}
\put(400,-730){尿酸}