hh 



Figure IIj7o 



Characteristic spectral absorption curves of neosiphoii= 

 axanthin and neosiphonein, isomers of siphonaxanthin 

 and siphoneino in ethanolo 



1 1 1 1 1 r 



N EOSI PHONAXANTHI N 



SIPHONAXANTHIN 



1 1 1 r 



NEOSIPHONEI 



SIPHON El N 



400 



450 



500 



