$(1)$ પેંટોઝ $(2)$ પેન્ટુલોઝ $(3)$ હેક્ઝુલોઝ $(4)$ હેકઝોઝ
$(5)$ આલ્ડોઝ $(6)$ કીટોઝ $(7)$ પાયરેનોઝ $(8)$ ફ્યુરાનોઝ
$\begin{array}{*{20}{c}}
{CHO} \\
| \\
{HCOH} \\
| \\
{HOCH} \\
| \\
{HCOH} \\
| \\
{C{H_2}OH} \\
I
\end{array}\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$\begin{array}{*{20}{c}}
{CHO} \\
| \\
{HCOH} \\
| \\
{HCOH} \\
| \\
{HOCH} \\
| \\
{C{H_2}OH} \\
{II}
\end{array}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$\begin{array}{*{20}{c}}
{CHO} \\
| \\
{HCOH} \\
| \\
{HCOH} \\
| \\
{HCOH} \\
| \\
{C{H_2}OH} \\
{III}
\end{array}$