CHEMISTRY 



205 



CHO 



I 

 CH 



II 

 CHOH 



CHOH CHO 



II I 



C 



c 



II 



CO 



COH 



CH 2 OH CH.OH CH 2 OH CHO 



I I I I 



CHOH CO COH COH 



I I II II 



CHO CH 2 OH CO CHOH 



CH 2 OH CHO 

 I I 



CO CHOH 



CHO 



CHO 



II I 



CHOH COOH 



CH 2 OH 

 I 



CHOH 

 I 

 COOH 



CH 3 



I 

 CO 



I 



COOH 



CHO 

 I 



CH 2 

 I 

 COOH 



CH 2 OH CHO 



CO 



I 

 COOH 



CHOH 



I 



COOH 



COOH 



I 

 CH 



II 

 CO 



COOH 



I 

 COH 



II 



c = o 



COOH 



I 

 CO 



I 



COOH 



