(一)维生素A(视黄醇) 1.结构 H3C CH3 CH3 CH3 CH2OH CH3 维生素A1 H3C CH3 CH3 CH3 CH2OH 维生素A2 CH3 （一）维生素A（视黄醇） H3 C CH3 CH2 OH CH3 CH3 CH3 维生素A1 H3 C CH3 CH2 OH CH3 CH3 CH3 维生素A2 1.结构