CHEMISTRY 



205 



CHO 



I 

 CH 



II 

 CHOH 



CHOH 



II 



C 

 II 

 CO 



CHO 

 I 

 C 



III 



COH 



CH 2 OH CH 2 OH CHoOH CHO CH 2 OH CHO 



I I I I I I 



CHOH CO COH COH CO CHOH 



I I II II I I 



CHO CH 2 OH CO CHOH CHO CHO 



CHO 



COH 



II 

 CO 



CH 3 CH 2 OH COOH COOH COOH CHoOH 



I I I I I I 



CHOH CH 2 COH CH C CHOH 



I I II II III I 



COOH COOH CH 2 



COOH COOH 



CHOH COH 



COOH 



I 



CH,OH CHO COOH 



I I I 



CO CHOH COH 



I I II 



COOH COOH C = O 



