" 91 - 

 TABLE IV„IIo Structural Formulas of Four Xanthophylls 



CH3 ^CHj CHj^ ^CHj 



C CH, CHt CH, CH, C 



/\ I ' I ' I ' I ' /\ 



CH^ C»CHCH«CCH«CHCHeCCH»CHCH»CHC«CHCH>=CHC«CHCH«C ^ CHp 



1 2 I I r 



°X A /\ /^"° 



C CH, Rhodoxanthin CH, C 



H 5 5 H 



(ill conjugated * 



including 2 C^O groups) 



CH, CH, CH CH, 



5/3 5v / ^ 



CHo CCH«CHC«CHCH«CHC»CHCHeCHCH«CCH«CHCH«CCH«CHC CHp 



I II I I 



HO=CH ,C /. HC-OH 



\y\ / \ / 



^C CH, Zeaxanthin CH, C 



(Dihydroxy=|3-carotene) 



(11 conjugated • +2 OH groups) 



CH, CH, CH, CH, 



\ / ^ \ / ^ 



CHo CCH»CHC»CHCH«=CHC«CHCH»=CHCH«CCH*CHCH«CCH«GHCH CH^ 



I II II' 



HO.=CH C /°V /^'^^ 



-C CH, Lutein CH, C 



( Di hydro xy-o(=carotene) 



(10 conjugated + 1 » + 2 OH groups) 



CHj CH3 CHj CH5 



C CH, CH, CH, CH, C 



/ \ I ' I ' I ' I / V 



CHo CCH«CHC»CHCH<¥CHC«CHCH»CHCH=CCH«CHCH«=CCH«CHCH uHo 



r 11 II I 



HO-CH C Cryptoxanthin /°V / '^ 



C CHx (Monohydroxy-j2)=oarotene) CH, C 



H2 Hg 



(11 conjugated • + 1 OH group) 



