RHODOXANTHIN 



2. RHODOXANTHIN C40H50O2 



History 



1893 MONTEVERDE^ observcs a new pigment in the reddish-brown leaves of 

 Potamogeton nutans. The same pigment is later found by Tswett^" in a 

 number of conifers, and described under the name "Thujorhodin". 



1913 Monteverde and Lubimenko^^ isolate rhodoxanthin in the crystalline 

 state. It is investigated in 1925 by Prat^^ q^^^ [^^ jg26 and 1927 by 



LlPPMAA^^. 



1933 Kuhn and Brockmann^^ isolate rhodoxanthin from yew trees and propose 



a constitutional formula for the pigment. 

 1935 Karrer and Solmssen^^ convert dihydrorhodoxanthin into zeaxanthin 



and thus confirm the constitution of rhodoxanthin. 



Occurrences^ 



Rhodoxanthin is fairly widely distributed in nature in small quantities. 

 It occurs in larger quantities in Taxus haccata L. (japonica). 



Source 



Aloe-species 



Bulbina annua 

 Buxus 



Chamaecyparis 

 Cryptomeria japonica 



Don. 

 Cypressus Naitnocki 

 Encephalartos Hilde- 



brandtii 



Equisetum-species 



Gasteria 

 Gnetum- species 



Haworthia 



Juniperus virginiana L. 

 Potamogeton naians 

 Reseda odorata 

 Retinospora pluniosa 

 Scirpus 



References p. 2^3—235. 



TABLE 47 



OCCURRENCE OF RHODOXANTHIN 



References 

 T. LIPPMAA, Ber. hot. Ges. 44 (1926) 643, H. Kylin, Z. 

 physiol. Chem. 163 (1927) 229. — H. Molisch, Ber. hot. 

 Ges. 20 (1902) 442. 



T. Lippmaa, Ber. hot. Ges. 44 (1926) 643. 

 T. Lippmaa, Ber. hot. Ges. 44 (1926) 643. 

 T. Lippmaa, Ber. hot. Ges. 44 (1926) 643. 



M. TswETT, Compt. rend. 152 (1911) 788. 

 do. 



M. W. LuBiMENKO, Rev. gen. Bot. 25 (1914) 475; Compt. 



rend. 158 (1914) 510. 



T. Lippmaa, Ber. bot. Ges. 44 (1926) 643. — S. Prat, 



Biochem. Z. 152 (1924) 495. 



T. Lippmaa, Ber. bot. Ges. 44 (1926) 643. 



N. A. Monteverde and V. N. Lubimenko, Bull. Acad. 



Sci. Petrograd [6] 7 (1913) 1105. 



T. Lippmaa, Ber. bot. Ges. 44 (1926) 643. 



M. Tswett, Compt. rend. 152 (1911) 788. 



N. A. Monteverde, Acta Horti Petropol. 13 (1893) 201. 



T. Lippmaa, Ber. bot. Ges. 44 (1926) 643. 



M. TswETT, Compt. rend. 152 (1911) 788. 



T. Lippmaa, Ber. bot. Ges. 44 (1926) 643. 



