⊙第一节维生素A(VitA) CH3 CH3 CH3- CH39 CH2OR 8 CH3 R=—H Retinol (Vit A alcohol) 000 0 R=C CH3 VAacetate 0 R=一C-C15H31 Va polmitate⊙第一节 维生素A( Vit A) R= H Retinol (Vit A alcohol) R= C CH3 O VA acetate R= C C15H31 O VA polmitate CH3 CH3 CH3 CH3 CH2OR CH3 9 1 2 3 4 5 6 7 8