C6：β 酮酸中间物

$结构式：$

\usepackage{chemfig}
\begin{document}

\chemfig{
C(-[4,0.3]H_2)
	(-[,0.8]\fbox{P})
	(-[6,0.8]C
		(-[4,0.8]HO)
		(-[,0.8]COOH)
		(-[6,0.8]C
			(=[,0.8]O)
				(-[6,0.8]C
					(-[4,0.2]H)
					(-[,0.8]OH)
					(-[6,0.8]C
						(-[4,0.3]H_2)
						(-[,0.8]\fbox{P})
					)
		)
		)
	)
}

\end{document}