${C_2}{H_2}\xrightarrow{{{O_3}}}X\xrightarrow{{Zn/C{H_3}COOH}}Y$
$\mathop A\limits_{(alkene)} \xrightarrow[{{H_2}O}]{{RC{O_3}H}}$ રેસેમિક મિશ્રણ
$\mathop A\limits_{(alkene)} \xrightarrow{{Cold\,dil.KMn{O_4}}}$ મેસો સંયોજન