(CH3)2−C−CHO\left(\mathrm{CH}_{3}\right)_{2}-\mathrm{C}-\mathrm{CHO}(CH3)2−C−CHO
CH3−CHO\mathrm{CH}_{3}-\mathrm{CHO}CH3−CHO
H−CHO\mathrm{H}-\mathrm{CHO}H−CHO
Ph−CHO\mathrm{Ph}-\mathrm{CHO}Ph−CHO
