99 



Carotenes and Carotenoids 



169 



Rhodopin, C4„H,:^60, violet-red needles, m.p. 168° (171°), U.V. 

 440, 470, 501 m^ in light petroleum. 



Polystigma rubrum 



Edgar Lederer, Bull. soc. chim. biol. 20 611 (1938). 



Synnove Liaaen Jensen, Acta Chem. Scand. 13 842 (1959). 

 (Structure) 



Paul Karrer and Ulrich Solmssen, Helv. Chim. Acta 18 25, 

 1306 (1935); 21 454 (1938). 



170 Rubixanthin (3-Hydroxy-y-carotene), C40H56O, coppery red nee- 

 dles, m.p. 160°, U.V. 432, 462, 494 nifj, in hexane. 



^^^ 



171 



Staphylococcus aureus, Coleosporium senecionis. Mi- 

 crococcus tetragenus 



E. Lederer, Bull. soc. chim. biol. 20 611 (1938). 



Ben Sobin and Grant L. Stahly, J. Bacteriol. 44 265 (1942). 



H. A. Reimann and C. M. Eklund, J. Bact. 42 605 (1941). 



Richard Kuhn and Chrlstoph Grundmann, Ber. 67 339 

 (1934). 



Cryptoxanthin (Cryptoxanthol, 3- or 4-Oxy-/?-carotene, C40H56O) 

 deep red prisms, m.p. 169° (vac), optically inactive, U.V. 

 425s, 450, 480 m/x in hexane. 



^^^ 



Mycobacterium phlei, Dacromyces stillatus, Vibrio 

 adaptatus, Pseudomonas xanthochrus, P. aestumarina, 

 Rocella montagnei 



