OVERSET{O}{\mathop{\underset{|}{\overset{||}{\mathop{C}}}\,}}}\,+\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\xrightarrow[\DELTA ]{KOH,C{{H}_{3}}OH}\] \[{{C}_{6}}{{H}_{5}}-\overset{OH}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}C{{H}_{3}}\xrightarrow{-{{H}_{2}}O}\] \[{{C}_{6}}{{H}_{5}}-\overset{{}}{\mathop{\overset{{}}{\mathop{C}}\,}}\,H-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}C{{H}_{3}}\]