Oliy va o’rta maxsus ta’lim vazirligi

              

5

C                                    O                                           C                          O  

 

H

 

H

                            

H            H                                                            H 

             4C       OH                             H              

C

1

- O – C

4

                

OH                  H 

C

1 

         

OH   3 

C                                C

2

    

 

                                      

3

 C                      C

2

             OH                                                 

                           H                               OH                                             H                       OH