CH3-CH2-CH(CH3)-CH(=OH) + CH3-CH2-CH(CH3)-CH(=OH)-------condensare alcoolica-----> CH3-CH2-CH(CH3)-CH(OH)-CH2-CH2-CH(CH3)-CH(=OH) ---------crotonizare------> CH3-CH2-CH(CH3)-CH=CH-CH-CH(CH3)-CH(=OH)--- (-H2O) ====> CH3-CH2-CH(CH3)-CH2-CH2-CH2-CH(CH3)-CH2(OH)