1,CH3CH(OH)COOH;CH2(OH)CH2COOH2,CH3CH(OH)COOH+NaHCO3=CH3CH(OH)COONa+CO2(向上箭头)+H2O CH2(OH)CH2COOH+NaHCO3= CH2(OH)CH2COONa+CO2(向上箭头)+H2O CH3CH(OH)COOH+2Na=H2(箭头)+CH3CH(ONa)COONa
A HOCH2CH2COOH或CH3CH2OHCOOH(即羟基连在羧基的两个邻位C上) C 羰基两端各连一个OCH3